While Tsuchigomori seems like a normal, caring and sort-of-meek teacher in his disguise, he is actually sarcastic, mischievous and quite short-tempered. He's also shown to be quite sadistic, having fun in threatening and scaring Nene and Kou  he's the keeper of the 4pm library, a library containing the futures and pasts of every person in the school dead or alive. He's the 5th wonder of the school. He's a spider ghost, being seen eating bugs and terrorizing students for fun. he's very important to the plot, being someone Hanako looks up to. At the end of the day this man is literally just a tired and grumpy old man. He is currently Kou's homeroom teacher and was previously Hanako's homeroom teacher before he died. As his teacher, he cared for Hanako viewing him almost as a son and was deeply affected when he died. His voice should be low, intense, intimidating and sarcastic.