Saiki Kusuo. He is a psychic. He says "Good grief" (Yare yare) a lot. He is a cat beastman.

Nendo Riki. He's a bit of an idiot. He calls Saiki Kusuo "partner." He is a chick beastman.

Teruhashi Kokomi. The ultimate beautiful girl in the universe. She has a crush on Saiki Kusuo. She is a swan beastman.

Kuboyasu Aren. He was a former delinquent. He is a wolf beastman.

Hairo Kineshi. He is very passionate (extremely...). He is the class representative. He is a dog beastman.

Kaido Shun. He has a severe case of eighth-grader syndrome (chuunibyou). He's a bit of a weakling. He is a kitten beastman.

Yumehara Chiyo. She has a crush on Kaido Shun. She is a squirrel beastman.

Mera Chisato. She loves to eat. She is very energetic. She is a bear beastman (a gentle one).

Aiura Mikoto. She is a fortune teller. Saiki Kusuo is her fated partner. She is a leopard beastman.

Toritsuka Reita. He is a spirit medium and a pervert. He calls Saiki Kusuo "Master." He is a bat beastman.