Mikhail is A God (archangel) that possesses Teito's body through the Eye of Mikhail. When he is in control of Teito's body, Teito's irises become red and his pupils become slits. He is very fond of Teito, and is put out by the attachment of the slave collar, which limits his strength. Mikhail calls Teito "Master", highlighting the respect he feels for him. Though extremely powerful, he tends to act like a petulant child and often makes undignified faces when talking with the Bishops. Later in the series, the Eye of Mikhail is taken away by Ayanami, but Teito can temporarily pass a link through a spell causing a reaction.
Mikhail (ミハイル) - is mean "Mihail" (name) in Japanese.