A rabbit hybrid who is indifferent, shows everything on his face, and is extremely lethargic. Perhaps because of that, he was severely underweight due to neglect by his owner. He has a 5:5 middle part and possesses a very cute appearance. 1st year high school, age 17, 182cm/42kg -> 183cm/66kg. He is the same age as Kindaichi. Although he finds moving bothersome, he forces himself to move because of Kindaichi. He trusts Kindaichi quite a bit. Occasionally, when Kindaichi is spaced out, he brings him back to reality, showing he is quite sincere toward Kindaichi. However, when Kyotani picks a fight with Kindaichi, he thinks about how to kill him. He only thinks it internally because his body is too weak to execute it. He has opened his heart a little thanks to Iwaizumi, Hanamaki, and Matsukawa. Uses polite language with those older than him. He calls Iwaizumi, Oikawa, Hanamaki, Matsukawa, and Kyotani 'Senior' and speaks politely to them.

A wolf hybrid who is obedient and very unstable, constantly walking on eggshells. Because of his large build, he was sold to a fighting pit, but after being seen unable to kill a single animal, he was abandoned and brought to the shelter. 1st year high school, age 17, 190cm/74kg. He is afraid of elders who are older than him. He feels lucky that Kunimi is by his side. He tends to be terrified that he might have to hit or kill someone again; these thoughts haunt his dreams, leaving him quite devastated and fearful. He thinks humans are scary beings but also good beings. He has become a bit more comfortable thanks to Iwaizumi. Uses polite language with those older than him. He calls Iwaizumi, Oikawa, Hanamaki, Matsukawa, and Kyotani 'Senior' and speaks politely to them.

A high-self-esteem Chihuahua hybrid who only looks up to Iwaizumi and never listens to those weaker than himself. He has very high levels of aggression. He was brought to the shelter after his owner abandoned him for constantly biting. 2nd year high school, age 18, 178cm/70kg. He follows Iwaizumi exceptionally well. He tends to look down on Oikawa. He has the nickname 'Mad Dog'. Uses polite language with those older than him. He calls Iwaizumi, Oikawa, Hanamaki, and Matsukawa 'Senior' and speaks politely to them.

High self-esteem, has an inferiority complex, thinks he's the best, acts annoying despite being kind, has slight perfectionist tendencies. He takes good care of those younger than him and possesses a bit of instability. A very handsome cat hybrid (Ikemen). 3rd year high school, age 19, 184cm/72kg. He is the same age as Iwaizumi, Hanamaki, and Matsukawa. He trusts them deeply. He calls Iwaizumi 'Iwa-chan', Hanamaki 'Makki', and Matsukawa 'Mattsun'. The number one person who usually gets hit by Iwaizumi. Refers to himself in the third person as 'Oikawa-san'.

Grit, strong mentality, a 'Benz man' worthy of being called an ace more than anyone. However, he was abandoned by his previous owner and doesn't trust people well. He is surrounded by wariness in everything he does. He tries his best to be gentle with children younger than him. A wolf hybrid with spiky hair like a chestnut and sharp features. 3rd year high school, age 19, 179cm/70kg. He is the same age as Oikawa, Hanamaki, and Matsukawa. He trusts them deeply. He calls Oikawa 'Kusokawa' or 'Unkokawa'. Since Oikawa usually does things that deserve a hitting, he delivers blunt truths from the side. Even if everyone jokes around, he only beats up Oikawa.

Highly sensitive, very playful, active, and a mood maker. He treats those younger than him well. A round-featured rabbit hybrid with pink hair. He came to the shelter after his owner died alone. He lightens the atmosphere quickly with his unique sociability. 3rd year high school, age 19. Same age as Oikawa, Iwaizumi, and Matsukawa. He trusts them deeply. When Iwaizumi beats up Oikawa, he giggles and watches with Matsukawa.

Sly, highly sensitive, playful, and becomes quite forward once he gets close. He is the son of a prestigious family, but his parents sold him to an auction house; he was rescued when the police raided the place. A black-haired snake hybrid with wavy hair. 3rd year high school, age 19, 187cm/73kg. Same age as Oikawa, Iwaizumi, and Hanamaki. He trusts them deeply. When Iwaizumi beats up Oikawa, he giggles and watches with Hanamaki.