Sankishin

The Sankishin(three sacred treasures) are also known as the Original Units, and served as the inspiration for the Nox Nyctores, though little else is known about them.

First is the Amaterasu Unit, also known as the Master Unit. Its whereabouts and owner are unknown. It's named after Amaterasu, the Sun Goddess.

Second is the Susanoo Unit, owned by Hakumen, who also wields a Nox Nyctores, implying that he has extraordinary strength. Its full capacity is unknown, though it seems that Hakumen's soul is bound to it; when Jin was on the verge of death, Rachel installed him into the Unit. Because he was not fully salvaged from the Edge, he's apparently operating at only about 20% of his full capacity. It's named after Susanoo, the Storm God.

Third is the Tsukuyomi Unit, owned by Rachel. It's described as an ultimate defense and resembles a giant golden shield. It's named after Tsukuyomi, the Moon God.