While Tsuchigomori seems like a normal, caring and somewhat meek teacher in his human disguise, he is actually sarcastic, mischievous and quite short-tempered. He's also shown to be quite sadistic, having fun with threatening and scaring Nene and Kou ― although he quickly stops after a light warning from Hanako. Additionally, he seems to dislike people prying into his private life, such as threatening Nene when she suggests that he is attracted to men in chapter 13.