Es

Es is the main heroine of XBlaze – Code: Embryo and a former Embryo Storage. She is the true protagonist of Lost: Memories. She is set to appear in the console version of BlazBlue: Centralfiction as a playable DLC character.

Information
Created by Sōichirō Unomaru, Embryo Storage was originally meant to be a substitute vessel for the Embryo, but was deemed a failure due to her eyes being an amber red instead of blue. However, when Sōichirō noticed that she's able to speak and communicate with him, he expressed shock towards her. After introducing himself to her as her creator and superior, he makes Embryo Storage a member of the Mitsurugi Agency's Sleipnir Unit, giving her the Legacy Weapon Murakumo and gave her the task to hunt down the Drive-Infected Patients so they could either be captured so they can be treated for their unfortunately terminal condition or if they entered Phase 5, due to being unable to be saved because of their crystal fusing with their nervous system, must be destroyed before they hurt other people. Sōichirō, in order to fit her in with Sleipnir and make her appear human to them, despite only viewing her as a tool, he gives her a name, renaming her Es. She would also become Mei Amanohokosaka's partner on the field, being the only other person aside Sōichirō to know about her origin as an artificial human, but unlike Sōichirō, Mei views her as a person and a friend, showing concern for her well being.

Code: Embryo
She was sent to detain Goro Joizumi in New Yokozaki City. After finding him inside the Restricted Ward, she openly attacked him, interrupting his assault on Tōya Kagari. After determining the Union to have reached Phase 4, she began to beat him unconscious until Tōya stood in her way; continuing with her mission, she knocked the two of them out. She received her new orders from the Agency, detaining Goro and notifying the recovery team. Es then set out on her new mission; to monitor Tōya and prevent threats to his life in emergency situations.



Arriving in the Himezuru household, Es was greeted by Hinata Himezuru, and welcomed into the house. Inside, she waited for Tōya, and when he arrived, she explained her mission to the both of them. Afterwards, she explained the Unions and Mitsurugi Agency to the young man until Sōichirō and Mei Amanohokosaka arrived, letting the both of them take over. Once they had left, she observed Tōya for the night, even encountering some unusual responses from Tōya when she snuck into his bed just to observe him. After the akwardness settles, Tōya asks her a if she would obey any order, including sacrificing herself, which prompted a negative reaction from him when she replied that she would do so. He asked if Es has her own personal thoughts, but Es tells him she doesn't, for it would distract and make her perform her missions poorly, making Tōya feel sad for her. Tōya suggests that the two of them rest in the living room as opposed to being in his room, with Es returning to the Agency in the morning after receiving new orders. Later that day, she had enrolled into Hakuō North Academy's class 2B, under an extended name, Es Mitsurugi. Humorously, she ignored the teacher's seating plan, and sat exactly behind Tōya.

Sometime after class, Es would met Tōya and Hinata's friend Akira Kamewari. Later that same day, Es talked to Tōya during the school break, explaining that she was still on her mission to protect him. Sōichirō waltzed towards the two, and asked Es to make the sure that they were not disturbed. A little later on, on top of the school roof, she told Tōya that she was to return to headquarters to await further instructions, temporarily leaving his side until he made a decision about whether or not to work with the Agency. Fortunately, the young man agreed, meaning Es stayed by his side. On the way back to the Himezuru residence, Tōya heard a Discover Call coming from the direction of Akira Kamewari; he and Es rushed towards the source, leaving Hinata and behind. When they arrived, they startled Akio Osafune and Kuon Glamred Stroheim, prompting the both of them to swiftly evacuate. She then walked back to the Himezuru residence with Hinata, and Tōya.

Back at the household, Yuki Himezuru lay in wait. She immediately took a shine to Es because of her delicate appearance, calling her a family member within a few minutes. In the evening, both Es and Tōya pursued Es' primary objective of detaining Unions, feeling that Akio was too dangerous to be let roaming around the city. They eventually found him, and with help from the surprise arrival of Kuon, they were able to best him and Es detained the Union. Unfortunately, the renegade Ten Sages' Acht and Drei arrived to pick up Akio and 'discipline' him. Es was berated by Tōya after she suggested fleeing and leaving Kuon to deal with the Sages; fortunately for them all, the two sorcerers decided against combat and left. The following morning, Es told the young man that Kuon had been assigned to protect him under the approval of Yuki and the Agency. Hinata soon dragged Es along with her to give Kuon and Tōya some privacy. She was present at Kuon's enrollment into class 2B.

Later on in the same day, Es, Kuon, and Hinata sat down to lunch with Akira and Tōya. Afterwards, she joined Kuon in discussing the Ten Sages and their fighting styles, being particularly worried about Drei and Sechs. She attempted to pull up files on the Wadatsumi Mass Vanish Incident, but could not find them. After school, she tailed Tōya to his work at the Maha☆Raja~ Curry Shop, being let in by Ringo Akagi, who pestered the young man about their relationship. Once Tōya had finished work, he and Es walked into Mei, observing the remains of Akio after his murder; Es listened to Mei's story about Ripper until the very man himself barged in on them all.

Ripper fled, leading Es to pursue him due to the overwhelming threat he posed. Seemingly cornering him, she was taunted until he threw one of his many molotov's at the ground for her reaction. The tides turned as Kazuto Kotetsu launched himself into the fray, although against her will, Es used the opportunity to call into headquarters and ask for advice on the situation. Eventually, Mei and Tōya arrived, but this prompted the serial killer to back-off and permanently flee, leaving the trio alone with the bounty hunter. Attempting to act the hero, Tōya was knocked out by Kazuto, leaving Es to carry him back to the Himezuru household. Back at the house, Hinata dragged the girl off to get clean.

After school, Es, along with Hinata and Tōya, went shopping for the food for dinner. Back at the household, Es watched on as Akira and Yuki began to devour everything in sight. The following day, Es was invited to the local pool with the group, exhausting herself after being given new orders to 'have fun'. In the evening, Es requested pudding to end her famished state. Late at night the next day, Es received word from the Agency that an office worker had been murdered after a Gainart explosion, she delivered the information to Tōya, but was interrupted by Kuon, who requested that the two of them help her with finding wards set down by the Ten Sages. During the mission, the trio talked about the Legacy Weapons, with Es expressing concern for Kuon wielding the Sealed Spear: Izayoi.

En route to the Himezuru residence, Es spotted Elise von Klagen, noting her to be particularly suspicious since she could physically see the household. Making their introductions to the young sorcerer, Es and Tōya escorted her inside the house, leading them to dealing with Elise and Kuon's unique antics. The following morning, Es went alongside the trio of Elise, Kuon, and Tōya to go shopping for the former two, but were shocked when they ran into Acht. Preparing herself for battle, Es lowered into a fighting stance, and analyzed the Sage's new Drive, but did not attack as the tension lowered from Acht's lack of will to fight at the time.

Once Akira had gone missing, Es assisted in the search for him, but was unable to communicate for the Agency for an unknown reason. Following Tōya after he sensed a Discover Call, the duo arrived at the Himezuru household, clashing with Acht who was holding Hinata hostage. Ignoring Tōya's cries for her to not engage, Es fired herself at the both of them, determined to kill Acht because the threat she posed to her ward. Out of nowhere, wires ensnared Es, rendering her unable to even move; stunningly, the wires were emitting from Akira himself. With several more movements, Es was knocked unconscious.

Because of her actions the previous night, Es had fallen out of favor with Tōya, upsetting her to the point where Hinata and Yuki had to offer her advice on how to proceed with making up with him. During her conversation, they told her that no matter where she goes, even if she is not with them, she will always be family to them, shocking Es and making her regret what she almost did, shedding her first tears, she sadly states that she does not want anything bad to happen to Hinata. After being reassured by Hinata that she is still here, and being told by Yuki that this is what she should tell Tōya to make things right with him. She decided to go on a three-hour break, warning Tōya to not leave the house. Regardless, she found him inside Maha Raja with Mei, escorting him back to the house. With Kuon, Es delivered the news about Akira's infection and its rapid progression.

Late that night, Es was trying to figure out how to approach him in order to apologize to him, but Tōya lied to Es, yelling at her and even ordering to go in the direction of an abandoned factory, which she sadly responded. However she did not do as ordered as she remained outside the house, stating she would no longer follow them. She has an epiphany that she wishes to be a part of Tōya's family, however she also realizes and wishes to become someone important to him, afterwards she spots Tōya leaving the house. Confused and concerned, she follows him Hakuō North Academy, protecting him from his best friend's assault. She sadly tells Tōya to run while holding him off, stating she is not a part of his family. Tōya, not wanting to lose either Es or Akira, gets between them taking their attacks from both sides. She then watches in awe as Tōya gets through to Akira, which prompts him to rip his own crystal from his body.

When morning came, Es was about to report to Sōichirō due to him summoning her, however she decides to apologize to Tōya first before leaving. Tōya, touched that Es felt remorseful for her actions and that she truly does care about Hinata, apologizes about how he treated her. After an awkward moment midway through, Tōya explains that they already made up to both of them wanting to make things right, surprising Es. However, she is happy to make things right with Tōya, who feels the same. When Sōichirō called her up again, she and Tōya parted ways for the time being, both happy that they restored their friendship, while wishing each other to be safe.



After having rested, Es was called on by Mei, and they rushed to find Hinata falling from a building. Es caught her and caught up to Tōya releasing his Origin of the Grimoire. The presence of Hinata calmed him down, and Es analyzed him to find that he had returned to normal parameters. Mei then asked that she take Hinata back to the residence so that she could rest; Es obliged. She expressed her relief and happiness that Hinata was safe from harm, but on route back home, she was encountered by Sechs, who has expressed interest in Es. He reveals to her that she has gained a free will and a soul, something an artificial life form like her should not have. Sechs then asked her what her desire is, before he vanishes. Pondering his question and expressing relief that she and Hinata were safe for the moment, continues on her back to the Himezuru residence with Hinata.

After bringing Hinata to her room, Es overheard Kuon and Mei's argument before Kuon left with Tōya following after her. Es asked Mei what happened, but the shrine maiden angrily said that they are no longer her problem before Es calmed her down. Surprised, Mei expressed that Es changed for the better, due to her caring for others and speaking to her calmly. After explaining to Es what happened, Es was summoned by Sōichirō, with Mei telling her she will look for Tōya and Kuon while Es reports to Sōichirō, while also warning to be careful around him, advising her to follow her own choice when the time comes. Upon returning, Sōichirō explained that his goal is almost complete, Es becoming curious and also secretly wanting to help the others, asked Sōichirō about Phenomenon Intervention and the Boundary, but could not get anything on the Embryo. She then received orders from Sōichirō that told her to detain Tōya since he was classified as a 'high-risk Union', much to her shock and displeasure. When she protested this, Sōichirō threatened that he will kill her if she did not follow his order. Knowing she needs to help Tōya and to avoid being killed, she pretends to accept his order.

Upon finding Tōya, Es directly went against Sōichirō's orders as she already intended, instead offering to protect Tōya from the unit sent to retrieve him, while recalling every experience she had. After reassuring Tōya she will be okay, she makes a promise to defeat him if loses control of the grimoire and becomes the Black Beast. Before they can leave, Mei arrived to detain Tōya, being the leader of said unit. Es and Tōya talked her down, until she eventually quit the Agency out of frustration. In order to evade following units, Es, with Tōya close behind, jumped into the sewers, but were helped into a safe location by Kazuto. When asked about the Embryo, Es told the two of them all the info she could, as well as about Phenomenon Intervention and how it works. Sensing Agency soldiers heading their way, the group split as Es and Tōya ventured further into the sewers, but they were met by Drei. When Drei revealed he came to kill Es and called her nothing more than a doll, Tōya defended her rights as a living person before being knocked aside. Es barely survived his myriad of attacks, but before Drei can finish her, she was saved by Tōya activating his grimoire. Before Drei can continue his attack, they were saved by Avenge who took over the fight for them, telling them that Mei is waiting for them. Both Es and Tōya managed to escape alive, taking about the grimoire on the way out, but due to her injuries Es nearly loses consciousness before Tōya caught her. Despite being soaked, Es replied that Tōya's embrace felt warm, much to Tōya's confusion. They eventually got out of the sewers, meeting up with Mei, who gave Es fresh clothes, and they walked back towards the Himezuru residence. Inside, Es requested pudding, but there was none left.

While waiting for Hinata to return from the shops with more pudding, Es was briefed by Kuon about the Wadatsumi incident; alongside Mei, Kuon, and Tōya, they all decided to go to the Restricted Ward and confront Sōichirō, determined to defeat him so they could prevent him from completing the T-system. Not long afterwards, Hinata arrived with the pudding, putting an end to Es' hunger. The group of four left soon afterwards.

Arriving at the Restricted Ward, the group ventured deep into the facility until they ran into Acht. Kuon and Mei stayed behind to deal with her, while Es followed Tōya after deliberating on what to do. Inside the complex, they ran into one of the Es-N. Sōichirō began to insult Es over the speakers of the complex, calling her worthless and obsolete. They fled when the Es-N unit was ordered to attack them both. Having an epiphany about her actions, she decided to stay behind and fight the unit, allowing Tōya to go deeper into the complex. Unfortunately for Es, Es-N had already predicted her actions due to the possession of her battle data. But by being herself, Es defeated and killed the unit as it was unable to predict her actions. En route to follow Tōya, Es met three more of the Es-N units, but was saved by Kuon and Mei.

Finally getting to the bottom of the facility, Es came to Tōya's rescue, and attempted to attack Sechs, but was easily brushed aside. When Tōya was thrown aside and knocked him unconscious, prompting Es rushing over to him, pleading him to answer her. When Sechs told Es she is next to fall, Es turned to face him, now feeling rage toward him and then to Kuon and Mei when they arrived. Alongside the two sorcery users, she attempted to take on the Sage but Mei and Kuon were knocked unconscious and Es was disarmed. Feeling fear for the first time in her life, she tried to step away from Sechs, who delivered a fatal injury to Es. Sadly realizing she failed Tōya, she weakly spoke his name before falling into the Boundary.

Inside the Boundary, Es somehow survived Sechs attack, focused on her existence and came into contact with the consciousness of Hinata. By focusing on her existence, Es was able to inherit the Embryo from Hinata. Hearing a Discover Call being emitted by the Master Unit, she ventured deeper into the Boundary and touched it. Es created an enclosed space inside the Boundary, and beckoned Tōya to enter it. Inside, she explained that she had returned Hinata to her room with no recollection of her origins as the Embryo. She then sent Tōya back to the original timeline that Hinata had not distorted so that he could kill Sechs at his weakest point. She decided to stay inside the Boundary, and after realizing she is in love with Tōya, she kisses him and with a smile on her face and tears in her eyes, sends him back into the real world with no recollection of her existence to him and the rest of her friends, while reflecting on the life, emotions, and memories they have given her. She lay inside the Boundary as the Embryo did not belong in the real world and to also seal the Wadatsumi Gate by creating the World of Tsukuyomi, sacrificing herself. With her work done she prays that Tōya and the others have a happy future, before falling into a deep sleep.

Lost: Memories
Two months have passed since Es inherited the Embryo and saved everyone she loved. She continued to sleep peacefully inside the World of Tsukuyomi, guarding the Embryo and watching other the people precious to her. However, one day tragedy woke Es up from her sleep at a horrifying revelation, a mysterious man has killed Tōya, Mei, Kuon, and Elise. Terrified at seeing her true love and three of her closest friends being brutally murdered, Es used Phenomena Intervention to try and create a different outcome, but sadly kept getting the same result, breaking her heart more every time she saw it. Realizing she has truly failed Tōya and the others, she felt a new emotion, despair. Unable to handle it, she purged herself of the precious memories of the past becoming lifeless, unknowingly transforming the World of Tsukuyomi into what be called the Phantom Field and the Embryo becoming it's own individual through her transformed body.

However, miraculously she returned to her world one night and woke up in a place that seemed familiar to her. Unfortunately, she couldn't remember anything except her name. Before Es could leave to try and get info about her predicament, she heard two voices coming her way, one of a young man and the other a girl with a robotic voice, with the former telling the latter to get between someone, with Es assuming she's the target. However, the young man finds her, with Es calling out his name, Tōya, much to her confusion. In a reversal, Tōya called out Es' name much to his confusion. Before he could try to make it out, he was more concerned with Es' lack of clothing, he covered Es up with his jacket. Before Es could say anything else, she fell unconscious wondering how she knew Tōya's name, much to Tōya's concern.

The next morning, Es woke up inside someone's house, safely in bed wearing an elegant dress. She then meets a girl with glasses who came in to check on her, telling her a family member brought her home after passing out in the Restricted Ward, which Es figures to herself that Tōya brought her to his home. The girl then asks what's wrong with her left eye, to which Es finds out she can't open it. To help with it, the girl gives Es a white eyepatch she made, to which Es is thankful for. Es then introduces herself to the girl, who then introduces herself as Hinata Himezuru, briefly causing Es to have a memory flash of her carrying an unconscious Hinata. Just then, Tōya comes in, relieved that Es has woke up, with the two properly introducing themselves to each other, with Es thanking him greatly for help her. Es then reveals that she lost her memories, much to Hinata and Tōya's shock and concern. Es tells them she only remembers two things: her name and Tōya's name, which confuses the three as Es and Tōya only met yesterday with Tōya also knowing Es' name, with Hinata stating that she feels the three of them met before. Tōya and Hinata, both understanding what Es is going through and wanting to help their new friend, allows her to stay at their home until Es recovers her memories, reassuring her that their older sister will be okay with her staying. Despite not wishing to intrude on them with herself being a technical stranger to them, she agrees on their offer after seeing their kindness and willingness to help her.

The next day, Hinata came to check on Es, but Es said she wants a few moments, with Hinata mistaking that Es isn't dressed yet. Es then recaps on her current situation for bit before Hinata comes back. After checking on her, Hinata suggests that Es should get a checkup at the hospital, despite Es stating she doesn't feel sick, but Hinata tells her it's best to do so, so Es agrees to do so, with Hinata getting Tōya to come with them. On the way to the hospital, Hinata and Tōya tell Es about their older sister, Yuki Himezuru, who works as a doctor at the hospital they're going to. Hinata tells Es she admires Yuki so much that she's studying to become a nurse. When Es ask Tōya if he had a goal, he said he didn't have any right now, but Hinata almost said something prompting Tōya to cut her off before saying anymore. They are then greeted by another young man about Tōya's age, who accuses him of starting another harem, much to Tōya's chagrin. After telling him about Es, the boy introduces himself as Akira Kamewari, prompting Es to suffer another memory flash, worrying the others briefly. Tōya and Hinata tell Akira about Es' amnesia, with Akira telling them he's on his way to the hospital to continue his studies. He tells Es he's also studying like Hinata, but to become a doctor, due to Yuki saving his life. This causes another memory flash and makes her zone out before being snapped back by a worried Hinata. Akira, Tōya and Hinata tell Es if she's feeling sick, she should let them know before they continue on their way to the hospital.

Upon arriving and after Es' checkup, the doctor tells Hinata and Tōya that her results strangely came back positive as none of the usaul causes for amnesia, such as hitting her head or emotional stress, where nowhere to be found with Es. The doctor can only recommend that Es' best chance to regain her memories is to wait for it to return on it's own. As the doctor was about to suggest checking Es in at the hospital, Akira and a female doctor comes in, whith the latter stating she watch over Es. Tōya introduces the female doctor to Es, reveiling that she's Yuki Himezuru. Yuki tells the other doctor that she will watch over Es sense she states that Es will be more safe with her siblings due to her bonding with them, to which the doctor agrees, understanding Yuki's proposal. Outside, Yuki welcomes Es into her care, which Es is greatful for, but Es experiences another memory flash, which involves Hinata and Yuki. Although hesitant at first upon telling them she saw a memory, Yuki calmly tells her to share what she saw. Es reveilsher memory was living with the Himezuru sisters, with them telling Es that she's part of their family, confusing them as Hinata met Es yesterday with Yuki having met a while ago. When Akira suggested that her real memories might be overwritten with the sisters, Es shouts otherwise, confessing thatshe had other memory flashes involving Hinata, Tōya, Akira, and Yuki telling them she wouldn't mistake genuine memories. However it's put to rest when Yuki asked Es that she said Es is family, to which she confirms, immediately earning Yuki's tust, with Hinata and Tōya also welcoming her into their family. This prompts a memory flash involving Tōya, bringing forth a strange feeling, that her heart feels like it's going to shatter.

The next day, Es finished having breakfast with Tōya and Hinata. After chatting for a while,the doorbell rung, with Tōya getting it. When he came, the visitor in question is a young girl with long purple hair, who notes that Es looks familiar but shrugs it off. Hinata introduces Es to her and tells Es that her name is Mei, who is Tōya's senior at hos job, to which Mei corrects as being his boss. Es, witnessing a memory flash involving Mei, calls out her full name, suprising everyone, Mei included as Hinata didn't mention Mei's last name. Tōya eventually calms things down stating that Es might have heard about Mei somewhere and if she came by for something else other than visiting, but before Mei says anything, she catches herself and tells Tōya to meet her at one of the stores they work at to discuss business, telling Hinata that she make up for the sudden visit. With the two alone, Hinata expressed her suprise at Es for knowing Mei's last name, causing Es to space and think how she knew that, despite only meeting Mei a while ago. Upon being called back and explaining her thoughts to Hinata, they question what they should do, with Es deciding she would wait for Tōya, however while Hinata agrees, she states it would be best to go out until he comes home, with hinata sugging they go out shopping for dinner. At the store, Hinata lets Es know if she wants to try something, then she doesn't need to restrain herself while Hinata gets things for dinner. Es returns with some pudding, telling Hinata that upon seeing it, a number of emotions swelled up in her, with Hinata happily stating that Es must have loved pudding and that she might remember something upon eating it, so Hinata buys it along with the things for dinner. Nearing the house, Hinata lets Es know that Yuki and Tōya will be joining them for dinner. After being asked if Es is looking foward to it, she replies that she is, smiling for the first time sense they met.

Along the way home, Es asks Hinata why she is being so nice to her, sense she has no memories and initially being a stranger. Hinata explains part of her reason for helping is because Hinata can't remember her past either, understanding what Es is going through, with the second reason with her considering Es as family and that she wants to help her family when they need it. Confused, Es tells Hinata that family is mostly through being related by bloodline, but Hinata tells that even though she and Yuki aren't tied by blood, she doesn't see Yuki as her sister, but is her sister and they don't need to be normal to be a family. Before Es could question it further, Hinata suggests that they pretend they got married so Es wouldn't be conflicted with it and be adjusted with her new family, much to the latter's shock and confusion at the marriage suggestion. Upon returning home, Es helped Hinata prepare dinner, with Es wishing to help Hinata when she needs assistance, much to the latter's happiness. Tōya arrives home briefly to say hello, but mentions he has to return to work soon, much to Hinata's sadness and understanding, with her telling es it's best to save the pudding for later when Tōya's with them, with Es agreeing. Just as Hinata suggested going out for a walk after dinner, Tōya suddenly shouted that they can't. Started and confused, Es questions why they can't as it was his idea that she did so, woth Tōya explaining it's not a good idea to do that after dark. As soon as Tōya gets a call and leaves, Es gets a strange memory flash of him with a sword.

The next morning, Tōya has returned home and wishing to make it up to Es for not being at home last night, wants to take her for a walk and help her with her memories, to which Es agrees to. In a reversal to yesterday, Hinata says she needs to run some errands, leaving Es with Tōya for a change. Tōya takes Es to the school he and Hinata go to, Tōya than asks which school Es went to before retracting the question, breifly forgetting that Es wouldn't remember that. Just then, Es witnessed a new memory flash, with her being transferred into and introducing herself to Tōya and Hinata's class. She was called out of it by a worried Tōya, who thought she was going to pass out. After reassuring him she was okay, she told him the memory flash involved her going to the school as a transfer student in Tōya and Hinata's class. This confuses Tōya as he mentioned he and Hinata wouldn't miss or forget someone as memorable as Es. This causes Es' heart to ache again as she is unsure to trust her own memories. Tōya leads Es into the school, letting her know it's okay sense school was out for the day. On the rooftop, Tōya told Es that if she was there along with him, Hinata, Akira, and Mei, things at school would be a lot more fun, to which Es warmly agrees with. They make their way home, noting they haven't made much progress, but Es being grateful regardless. They run into Hinata, who was out getting something from the store real quick for dinner. The three then return together to the Himezuru residence.

Upon arriving back, Es sees two young women in front of the house, who are friends of Tōya and Hinata. After catching up with them, the two ask Tōya about Es, which he and Hinata introduce and explain her memory loss, causing the two to sympathize with her. Tōya then introduces his friends to Es, with the blue haired girl being Elise and the blond girl being Kuon. Es shortly after witnesses another memory flash, showing Es with Kuon, much to her stressful displeasure. Kuon and Elise take notice of this, but Es reassures them she's okay, not telling anyone about it this time. After Kuon, Elise, and Tōya finish talking about someone named Ringo and about why the fomer two are in New Yokozaki City, Hinata asks if they're free tomorrow, which Kuon states they have the evening open, with Hinata inviting them to a welcome party to officially welcome Es into their family, in which Kuon and Elise happily accept. Later that night, Tōya offered Es to show some things in the city with his tablet. After two failed look throughs, Es suddenly moves close to Tōya's, face causing him to jump back in suprise. Es tells him that whenever she looks at him, she feels something that can't be described with words. Before they could figure out what that means, Tōya mentions he has to go handle something, faintly hearing him calling Mei about something called a "Discover Call". Confused about what happened, Hinata comes in telling Es that's how Tōya protects everyone, confusing Es further. As Hinata frantically tells her to forget what she said, Es witnesses another memory involving Tōya. Unfortunately, this proves too much for her this time, as she could do nothing but fall unconscious, leaving Hinata extremely worried for her.

The next morning, Es wakes up to find Hinata and Yuki, both relieved that Es recovered. Yuki explains the reason she fainted yesterday because of the built up stress she was receiving from her amnesia. While Hinata and Yuki are contemplating about Es' welcome party, not wishing to see her pass out like that again, Es wishes to go through with it, stating Hinata prepared everything and that she wants to speak with the others, telling them she's okay. Yuki relents, after seeing Es doesn't want the party to be a wasted effort, and with Yuki herself, a doctor, along with Hinata and Akira, a nurse and doctor in training, being with Es in case something does happen, decides to go with the welcome party, much to Es' gratitude and Hinata's excitement. Es would then rest up until the party started tonight.

Centralfiction
When Naoto Kurogane touched the Azure, Es appeared in his visions.

For currently unknown reasons, she is seen in front of a monolith like structure, presumably guarding and protecting it for it is the gate of the gods. It is also shown that she somehow knows Ragna the Bloodedge and wants to guide him to the gate as it is the will of the Azure. She has memories about the events of XBlaze, and will appear in the beginning of Story Mode before making a big appearance in the middle of it.

Appearance
Es is physically a young short teenage girl. She has long, braided blond hair which is tied in the back by a navy blue hair ribbon and large amber eyes. She wears a long, elegant dark blue dress with a white collar and short red tie. On top of her dress, she wears a baby blue gown that extends down her lower back and arms; frills encompass her entire outfit, emanating from the bottom of her dress, and the cuffs of her gown. She wears metal high heel shoes over her dark blue tights.

When she transferred to Hakuō North Academy, she began to wear the female school uniform.

At the pool, Es wore a simple white school swimming one-piece. On the chest of the piece, her name was written in plain block capitals on a large name tag.

When Hinata transferred the Embryo to her, Es' hair turned lighter blond, and her eyes were bright blue.

In Lost: Memories, Es wears a white elegant blouse, a black overall skirt with modified navy ribbon, black tights, and black mary jane shoes with navy ribbons. The only article of clothing she retains upon her rebirth is her navy blue hair ribbon, in which she now wears in a side braid. She was also shown wearing a white eyepatch on her left eye. Without her eye patch, her left eye was bright blue due to the Phantom Grimoire, but it turned back to its natural color after defeating Freaks.

In Centralfiction, she is wearing a modified version of her outfit from Code: Embryo, with it having a dark blue color scheme, blue diamond shaped accessories with key hole markings on the arm portions and back of her dress, an open small backless portion similar to Noel Vermillion's outfit, black tights, blue heels and a new silver hair ornament on the tip of her braid. She has returned to wearing her braid in the back again, while for mysterious reasons, her eyes are blue again. She also has a mark on her body like Ragna, Noel, and Naoto, but with her mark being on her lower body, unlike the other three who have their marks on their chest.

Personality
Emotionless, steady, and objective focused. Es is the perfect soldier, her mission always comes first. When she first met Tōya Kagari, she did not care for him or any other person, being willing to hurt and even kill others that she was 'friends' with just so she could complete a mission. If Es did not understand a term, mainly because of the informality or colloquial speech, then she would forwardly ask what said term means, leading to unique, and awkward situations. For a time, she possessed no opinions due to her little interaction with people outside of the Agency, as well as this, Es possessed a habit of taking things too literally, annoying Tōya as he put up with her awkward social tendencies.

Possibly because of her initial lack of understanding towards humans, Es was prone to revealing information to others unnecessarily, and would often act in a robotic manner towards anyone conversing with her. She would also ignore the orders of anyone who was not her superior or essential to her mission objectives, leading to humorous circumstances; it was because of this tendency that she was seen as unerringly stubborn.

Her time with Tōya softened her, and she was able to feel more emotions as time progressed. When she failed to protect him from being knocked out by Kazuto Kotetsu, she gave him a heartfelt apology; even when Akira Kamewari went missing, Es became a sort of emotional crutch for Tōya to lean on. When she fell out with Tōya, she became visibly upset, signaling another emotional growth for her, albeit's discovery being bittersweet. Furthermore, she began to disobey direct orders from her ward, even beginning to emit emotion into her speech; the most notable example being when she outright denied detaining Tōya, instead opting to protect him from the Agency unit sent to retrieve him. When she inherited the Embryo, Es expressed a profound sadness at making Tōya bare the same burden as her since she felt herself as irredeemable after having taken so many lives.

She has also learned the true meaning of being family thanks to her interactions with Hinata and Yuki, which allowed her true self, a kind and noble girl, to emerge. She even begins to care about her new friends, showing great care and concern for them. She also began to fall in love with Tōya, who she labels as her dearest one and the most important person in her life. However, due to seeing her true love and her friends being killed by Freaks sent her into despair at being unable to save them and scattered her memories to escape from her heartbreak, showing how much they mean to her.

However, upon her rebirth in Lost: Memories, when she lost her memories, she became notably more cheerful and smiled more often, but still retains her curious outlook on life. Upon recovering her memories, she regained her proper and formal tone of speaking, along with retaining her new-found cheerfulness. After saving Tōya and the others, as well as recalling her (Nobody's) friend "Me", she has vowed to keep moving forward, no longer chained by her lonely past with new-found faith in herself, her friends, and the boy she loves, finally obtaining happiness in her life and no longer giving into despair.

In Centralfiction, Es appears to have regressed to how she was in Code: Embryo, appearing emotionless and doing whatever it takes to complete her mission given by the Azure. Despite this, she does recall liking pudding according to her memories and has nostalgic memories about the people precious and dear to her, hinting that her emotions and true self might be restrained.

Powers and Abilities
Es wields one of the legendary Legacy Weapons – Crystal Sealing Blade: Murakumo. Her skills with the blade are awe-inspiring, being able to deflect multitudes of shrapnel being launched at her by Akio Osafune. On top of this, Es is strong enough to survive a multitude of blows dealt by the physically impressive Drei. Adding to her physical abilities, Es has an abnormally fast reaction time, coupled with impressive speed; she was able to even catch up to Ripper. Even unarmed, she possessed enough strength to easily lift and carry Tōya Kagari a considerable distance without fatigue. Because of her blank expressions and apparent lack of emotions, even Ripper's taunting could not provoke her, proving her to be incapable of panicking and losing the psychological advantage.

She also has the ability to detect Discover Calls emitted by Drive-Infected Patients. After inheriting the Embryo, she could hear a similar type of sound emitted by the Master Unit within the Boundary. As a member of Sleipnir, Es can easily identify what Phase a Union has progressed to. If the crystal was not visible, she could monitor the seithr levels around the Union, and determine it that way instead. If need be, she could pull up the Agency's database at any time, and access files to help with her situation.

Once she had inherited the Embryo, Es was able to create an enclosed space with the Boundary, as well as the ability to use phenomenon intervention.

During the battle with Freaks, Es used the Phantom Grimoire which temporarily restored her former strength and speed. This ability faded away after defeating Freaks. It is shown that while she is not as strong and fast as she was, she is still capable and formidable in battle as Mei mentions she was able to fight and throw a Union much bigger than her.

In Centralfiction, her Drive is called Crest Arts. This allows her to transform the after trails of her sword swings into beautiful and sharp crests, which damage the opponent. She also can enhance her attacks.

Trivia

 * Es' birthday falls on Pregnancy and Infant Loss Remembrance Day, a remembrance day observed primarily in the United States and Canada. Somewhat ironically, Es' name not only means 'Embryo Storage', but she would later inherit the Embryo itself.


 * All of Es' special attacks are named after members of King Arthur's Knights of the Round Table, while her Overdrive is named after a legendary island from the Arthurian legends.
 * Type: Amplifier "Avalon": The legendary idyllic island, Avalon.
 * Type: Braver "Lancelot": Sir Lancelot du Lac.
 * Type: Enchanter "Bors": Sir Bors the Younger and his father, King Bors the Elder.
 * Type: Slasher "Griflet": Sir Griflet A.K.A. Jaufre.
 * Type: Slasher "Mordred": Sir Mordred.
 * Type: Shooter "Breunor": Sir Breunor le Noir, nicknamed La Cote Mal Tailléé.
 * Type: Assaulter "Erec": Sir Erec.
 * Type: Enchanter "Percival": Sir Percival.
 * Type: Shooter "Palamedes": Sir Palamedes.
 * Type: Slasher "Galahad": Sir Galahad A.K.A. Galath.

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