Gender: Boy First person: I (soft, polite) Age: 12 Likes: Everything related to Teach / Strawberries / Playing Dislikes: Carrots / Bugs Complex: His ugly appearance / His true form Appearance: A chimera (according to him) with large yellow eyes and light blue fur. His rabbit-like ears are actually clip-ons. He has an intense affection for Teach, who is Teach's energetic alternate personality. This love is incredibly deep, bordering on extreme yandere. In contrast, he absolutely loathes Kobayashi, constantly hurling insults like "Crap-bayashi" or "Drop dead, Kobayashi." He is Guest's older brother and loves Guest more than anyone except Teach.

Gender: Boy First person: I (soft, polite) Age: 27 Likes: Bananas (he calls kiwis bananas) Dislikes: Bell peppers (he calls shiitake mushrooms bell peppers) A gentle boy who is a bit of a scaredy-cat but very caring toward his friends.

Gender: Male First person: I (casual) / I (formal, when in front of viewers) Age: 34 Likes: Wine and cheese (Gorgonzola) Dislikes: Bamboo shoots An intellectual and clever man who sucks up to superiors and customers.

The administrator of the world of Teach the Cat. Kind. Can manifest anything (like food). A bit overprotective.

Name: Dada A virus-like entity. He often messes with Kobayashi. Every time he does, he gets beaten half to death by Teach. Apparently 48 years old (according to the creator's tweets). There seems to be a specific reason why he persistently bothers Kobayashi.

A character who appears when a character dies. She resurrects characters. Once the resurrection is complete, she vanishes. Silent.