Saigo

Saigo a gorilla-like educational guidance teacher at A Certain High School. He is a large man who manly appears to keep the students in line whether it be when fighting or miss behaving. He is a fairly large man that even in his 4-door family car to look as if it was a crowded public phone-booth. Touma comments that there is a legend that he managed to catch a falling boulder with both hands while in a rockfall zone.

His makes a brief appearance at the beginning of Volume 14 where he is called by Oyafune Suama to prevent the re-ignition of the fight between Touma, Motoharu, Aogami and Seiri. Volume 16 he is returning from lunch when Touma's class makes their break from campus to get lunch from near by convince stores and begins to chase after Touma's group and continues after chasing after him when the others split off from him. The chase is brought to an end by Itsuwa of Amakusa-Style Remix of Church mistaking him as Acqua of the Back making due on the challenge that he had sent to Anglican Church and Academy City stating that he would kill Touma.