Kouyagi

Kouyagi (香焼) is a young member of the Amakusa-Style Remix of Church.

Appearance
His appearance is considerably older in the anime.

Toaru Majutsu no Index
Among the Amakusa Christians in the anime he is the one who has the most fighting scenes along with Itsuwa and Tatemiya Saiji.

Acqua of the Back Arc
Kouyagi is present with the rest of the Amakusa as they spy on Itsuwa and Touma from behind a nearby building. He and the rest of the men gather around Tatemiya Saiji as he describes Itsuwa's greatest weapon which she has yet to use, and faints at the conclusion.

Homecoming Arc
Kouyagi was among the crowd that gathered to watch Tatemiya Saiji attempt a sword catching technique with Itsuwa. After several failures and the suggestion that the bamboo blade might be throwing Itsuwa's timing off, Kouyagi offered her a metal imitation sword to try using, to Saiji's dismay.

Abilities
Kouyagi's main weapon is a. His fighting style seems to be centered in parrying incoming attacks and then using his agility to catch the enemy before they can recover their fighting stance. His acrobatic prowess allows him to use quick jumping kicks and difficult evasive maneuvers.