Tatemiya Saiji

Tatemiya Saiji (建宮斎字) is currently the Substitute Supreme Pontiff of the Amakusa Catholics.

Appearance
He has impressionable pitch-black hair and a unique sense of fashion. He wears an over-sized shirt, with a red cross to symbolize his position a temporary pope of Amakusa, and his shoe laces are one meter long.

Personality
He doesn't need a reason to save people, which resulted in him attempting to save Orsola Aquinas. He wants to rebuild the Amakusa Catholic Church into something that can be called a home to Kanzaki Kaori again, so she doesn't need to leave them again to protect them from getting involved in incidents due to her powers of a saint. He is also able to inspire those that follow him, with either being rude to the point of enragement, or providing example and referring to how Kanzaki taught them to live.

Orsola Aquinas Rescue Arc

 * Main article: Orsola Aquinas Rescue Arc

Saiji and the rest of the Amakusa Catholics were suspected to have kidnapped Orsola Aquinas and the Book of the Law to achieve ultimate power. But the truth was that they were trying to help her escape, but she could not trust them as they were melee fighters who carried weapons. They kept on pursuing her and eventually recaptured her and awaited the time they could teleport away from the scene. But they were confronted by Touma, Stiyl, Index, and the Agnese Forces.

Saiji confronts Touma and Stiyl who puts up a good fight as well as voiding everyone's attack. But he is defeated by Touma and Stiyl who ram into him and binding him through Stiyl's runes. While in custody he has a chance to talk to Touma and Index, trying to convince them that they are not the enemies, rather, the Roman Catholics were as they wanted to kill Orsola Aquinas, and that they did not want to disappoint Kanzaki again after all the people who sacrifced themselves for her sake. Touma and Index then hear the distressful cry from Orsola and suspect something strange about the situation. Then Lucia and Angelene appear to take him in for judgment. But Touma askes for the truth and accidently touches Lucia who becomes hostile and tries to kill him. Saiji attempts to move, but is magically bound and cannot. Index helps Touma out of his situation and the two nuns retreat.

Queen of the Adriatic Sea Arc
In this he appears to rescue Touma, Orsola, Sisters Lucia and Angelene from the ocean depths, who escaped from on of the ice ships from the fleet.

Acqua of the Back Arc
He along with the other Amakusa try to protect Touma from Acqua. After they are defeated he rouses the troops and unintentionally inspires Itsuwa into an uncharacteristic frenzy.

New Testament: Homecoming
He is seen trying to calm down Itsuwa who is dealing with the revelation of Touma being alive by offering to spar with her. Sister Lucia and Angelene then observe hoping to see actual sword-edge catching, which they oblige jokingly, and fail. This then turns into a matter of pride and it reaches the point where they use an actual japanese sword said to be able to cut through 1000 sheets of paper.

Abilities
He is an expert in Amakusa-Style combat and wields a 180-centimeter-long side-sword with a flambard blade.

He knows Anti-Impact and Anti-Flame spells, shown in volume 7, among many others that the Amakusa uses.