Tsuchigomori

Tsuchigomori (土籠) is a teacher at Kamome Academy. He is secretly a supernatural representing the academy's 5th Shool Mystery, the 4PM Bookstacks, and also its curator.

Appearance
Tsuchigomori is a tall, lanky man. He has spiky black hair, with a long white fringe, and purple eyes. He has unnaturally sharp features for a human, such as claw-like hand and shark-like teeth.

He wears a cream-colored coat with a fuschia sweater and a golden eyeglasses.

In 1969, he is shown to have all-black hair and doesn't wear glasses, his sweater are also replaced with a dress shirt.

Personality
Tsuchigomori is a mischievous and quite short-tempered man. When he's in disguise, he's more calm and caring than when he is in his true form. Although he is a teacher, he is shown to be disliking children because of their noisy attitude. He also likes to joke around, he once jokes about liking to eat human children to Hanako, but only receiving a terrified looks from Hanako, Nene, and Kou.

He also once said that he only pretend to care about his student. Despite what he said, he actually cares genuinely for them. Like how he asked Yashiro Nene about how's the number seven "Hanako"'s doing and how's his and her relationships doing. Nene responds with how Hanako always protects her and that she view him as a friend, which Tsuchigomori replies as a relieve.

Trivia

 * His favorite snack is bekko candy.
 * His latest concern is how hard it is to live a double life as a teacher and a supernatural.