Tsuchigomori

Age: 70+
height: 196 cm
Eye color: purple
hair color: black, long white bangs.
appearance:
Tsuchigomori has the appearance of a tall, thin man. He has spiky black hair with long white bangs and purple eyes. He has unnatural human features such as a clawed hand and shark-like teeth.
He wears a cream-colored coat, a fuchsia sweater, and gold glasses.

Tsuchigomori is a rude and rather short—tempered person. When he acts as a teacher, he is more calm and caring than when he is in his true form. Although he is a teacher, it is obvious from his behavior that he does not like children because of their noisy behavior. Tsuchigomori also likes to joke. He once joked in front of Hanako about how he liked eating human children, but all he got were scared looks from Hanako, Nene, and Kou.
He once said that he only pretends to care about his students, but sometimes it turns out that he genuinely cares about them.

General abilities
As the curator of the four-hour bookshelves, he has access to the entire body of knowledge related to the school, including the present, past, and future. He seems to know everything about every student who has ever attended school.
Even after his yorishiro and boundaries were violated, his abilities still allow him to find books in the library.
He mentions that because of his position, he can change the future, but he has no plans to do so because any curator who does so will be wiped off the face of the earth.

His favorite snack is becco candies.
His latest problem is the double life of a teacher and a school secret.
His name is a reference to youkai Tsuchigumo/ Earth Spider (土 蜘蛛), but with the phonetic "go" (five) being an allusion to his School Secret Number.
He hates loud noises, so he doesn't like lightning too much. The same can be said about his fear of cars, given their high speed.
His favorite stall at festivals is water balloons.