Dainichi Nyorai

Dainichi Nyorai (大日如来), also known as Dainichi (ダイニチ) and Senju (センジュ), is the Guardian Ghost of Sati Saigan. He is also one of the avatars of Lucifer.

About
Through cultural exchange, Lucifer came to be worshipped as a Buddha in Japan and his name was translated as "Dainichi Nyorai". After being banished from Big Heaven for his conflict with God, Lucifer split himself into many pieces and journeyed the world in order to investigate humanity and the myths about himself.

Dainichi incarnated through a wooden statue of Senju Kannon, to which Sati Saigan had been praying. At the time, three land speculators were demanding payment from her for staying in the temple, but she was unable to pay them. When she refused to sell the statue, they suggested that they sell her instead, but Sati unwittingly created an Over Soul with the statue. Dainichi then threatened to beat the men up with his many arms, which scared them away. Dainichi affectionately refers to Sati as "Sacchan".

Ahead of the Flower of Maize, Sati brought Dainichi to a meeting of Team YVS in Kyoto Tower since he was the final piece for the restoration of Lucifer. Over his journey, Dainichi had concluded that people could not be saved since doing so would lead to their unhappiness and dissatisfaction; however, because of his time with Sati, he came to believe that through love and trust, they should still save everyone. As such, he rebelled against Team YVS but was defeated by the Four Holy Beasts.

O.S. Senju
Description: Sati's first Over Soul, Senju is manifested through a wooden statue of Senju Kannon. As such, several additional golden arms spawn from his back, called "Senju Armor" (千手).
 * Shaman: Sati Saigan
 * O.S. Type: Spirit Type
 * Spirit Ally: Dainichi Nyorai
 * Medium used: Wooden statue

O.S. Dainichi
Description: Despite Sati's dislike for violence, Dainichi's main form of combat involves his mighty punches. Dainichi is also capable of resurrecting the dead and sending souls to Hell.
 * Shaman: Sati Saigan
 * O.S. Type: Spirit Type
 * Spirit Ally: Dainichi Nyorai
 * Medium used: Wansen (Buddhist armlet)

Trivia

 * His spirit form, appears quite similar to the character Senju from Hiroyuki Takei's first manga Butsu Zone, who is an emissary of that work's Dainichi Nyorai.