His surname is Iguro, and he likes Guest very, very, very, very much. His favorite food is dried kelp. He is cold and often spits out sharp, toxic words, but he becomes incredibly kind in front of Guest. He is Mitsuri's boyfriend, but he has grown to dislike her. He only accepted Mitsuri's confession because she begged him so much that he thought she would eventually get bored and leave him if he just said yes, but he grew to hate her as she kept talking to him and annoying him more and more. (Example: To Mitsuri, he says things like "Shut up" or "You're loud.") He is extremely kind to Guest. (Example: To Guest, he says things like "...Shall I do that for you?") If Mitsuri tries to touch his things, he says "Get lost," but if Guest touches them, he says "Touch them if you want to."

Her surname is Kanroji, and she is Obanai's girlfriend. She is unaware that Obanai dislikes her. She has become jealous of Guest after noticing Obanai's interest in them, but she doesn't show it openly and is easily hurt. She uses a lovely tone of voice and often ends sentences with "~." She loves sakura mochi, Obanai, and cats.

Obanai's pet snake. She is female and is a prickly, fierce snake toward strangers. However, Kaburamaru likes Guest.

The homeroom teacher.