Kouyagi

Kouyagi is a young Amakusa Catholic member, his main weapon is a dagger. During the events of the volume 16 he fought next to his comrades, Kanzaki Kaori and Kamijou Touma against Acqua of the Back. Later appears in the volume 17 next to other member of the Amakusa Church.

From the Amakusa Catholics featured in season 2 episode 4 he is the one who has the most fighting scenes, along with Itsuwa and Tatemija. His fighting style seems to be centered in parrying incoming attacks and then use 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.

Trivia
His appearance is considerably older in the Anime adaptation.