The hero of the story. A former slave captured by the Barsburg Empire and considered to be the military academy's star pupil. His homeland is the former Kingdom of Raggs, and he was raised as an orphan in a church. It is later revealed that Teito had been entrusted with the Eye of Mikhail when the Empire invaded his home country, and he is the son of the former king of Raggs.
At the start of the manga, Teito makes a promise with his best (and only) friend, Mikage, that they would die together. Unfortunately, Mikage gives up his life to save Teito from the Empire. Teito, shaken, swears revenge even though Mikage told him not to. At the 7th District church he starts studying to become a priest, so he can gain a priest's advantages on his way to revenge -- free room and board in any inn in the Empire, and less stringent inspections at borders. However, along his way he gets mixed up in the affairs of the Gods because of the Eye of Mikhail, and this eventually brings him grief.
Teito has a slave tattoo on his back from when he was first captured, and wears a slave collar around his neck, put there by Ayanami, that will explode if he gets separated from Frau, the collar's master, for 48 hours.
His birthday is the first of December, his blood type is O, he's 159 cm tall, and he weighs 43kg. His favorite food is macaroni gratin, his favorite drink is melon soda, and his favorite color is sky blue.