Embryo

The Embryo (エンブリオ) is the core part of the T-system built by Takamagahara. It has the power of God and can create phenomena intervention. Hinata Himezuru is the only Embryo, also known as Code: Embryo (コード：エンブリオ).

Information
The Embryo was created by Takamagahara and the Magic Guild to act as the core for the T-system. Its main purpose is to open up the Gate to the Boundary and draw out its power. The Seithr drawn out from the Gate is then used to power up the T-system. Its other powers include the power of phenomena intervention, meaning it can recreate time as it pleases, with the only person capable of remembering past timelines being the wielder of Manifestation Demolition Blade: Kusanagi, which has the ability of "Shared Existence".

In order to properly temper the Embryo, the Original Grimoire is needed. This was lent to Takamagahara by the Magic Guild. The initial "birth" of the Embryo was at the Wadatsumi Laboratory.

The only Embryo created was Hinata Himezuru, and she herself is only half completed. This is because while she was being tempered, the Grimoire went out of control and absorbed the souls of everyone around the laboratory. However, this was stopped halfway by Tōya Kagari's mother, a scientist who feared for the lives of everyone left. This event was later known as the Wadatsumi Incident.

Trivia

 * The creation of the Embryo mirrors the creation of Mu-12 in many ways. These include:
 * Hinata and Mu-12 are both artificial beings who were half created.
 * Both creations killed many scientists and were known as tragic events, both earning names (the Wadatsumi Incident and the Burning Fields of Ikaruga, respectively).
 * Both Hinata and Mu-12 have similar abilities, being the Azure Eyes and the Eye of the Azure, respectively.
 * The save file's name of the scene when Hinata transfers the Embryo to Es is Succession of the Azure (蒼の継承), which implies that Embryo is the same thing as the Eye of the Azure.