Itsuwa

Introduced in light novel volume 11.

Itsuwa is a 16-year old girl who is among the members of the Amakusa Catholic Church.

Appearance
She is a young girl with brown chin-length hair in a bobcut with short fringes.

Her outfits consists of clothing worn such that much of her skin is exposed, though often not by her own choice. In volume 14 she was forced to wear those clothing because she had nothing else to wear after jumping into the river to save Touma, and in volume 16 the pants were designed by Academy City to make it seem to expose a lot of skin, but it's just fabric that look like skin underneath.

Personality
She seems to have romantic feelings towards Tōma but due to her shyness, she was not able to act on them and convey them to him, she even say even if their Supreme Ponfit (Kaori) having feelings for Touma, she will never give him to her.

God's Right Seat Arc
After Touma's involvement in the Amakusa Catholics and later, their agreement to aid Touma in Italy, Itsuwa helped Touma and Motoharu to take and destroy the Document of Constantine. She and Touma fought Terra of the Left who was guarding that artifact.

In later events, she was assigned as Touma's bodyguard when Acqua declared he will come and take his life. When Acqua first attacked she failed to protect Touma, trying but failing to heal him with magic several time. After Touma was sent to the hospital she was despairing about her failure, before being rebuked by Tatemiya Saiji, saying to stop feeling sad and look to the future when Acqua will come and attack again, and prove to Touma that it was worth it for him to have protected her against Acqua. During the Amakusa Catholics' rematch against Acqua after Touma was nearly killed, she displayed a sudden change of personality, becoming full of tranquil fury that even the way she spoke changed after Tatemiya's words. Various male members of the Amakusa Church that saw this change rebuked Tatemiya for going too far with his words, talking without thinking just to snap Itsuwa out of her despair, now they will all have traumatising views and fear towards any woman that's in love.

Her weapon is a Friulian Spear that can be disassembled and reassembled, for purposes of carrying it around without people noticing it.