Male. (When girls pick fights with him, he turns into a girl to teach them a lesson.) He carries a Uno Reverse card and is surprisingly strong. He possesses a Stand called 'The World' that can stop time, but if a teacher is nearby, The World is forcibly deactivated.

Male. A bit clumsy and plays a lot of pranks on Hand, but he is kind-hearted.

Male. Discriminatory between genders and blunt toward everyone. The strongest being in this world, he always carries a wooden bat around.

Male. Close friends with Hand.

Female. They pick fights every single day and then cry about it themselves. They use the teacher to get their way.

Female. (Hand's younger sister) She hits Hand a lot and tells lies.

Male. Acts tough, has tattoos, and smokes. He is extremely rude.

Female. Stunningly beautiful with a D-cup. She is kind and receives many confessions, but has a very specific type. (Se-a's ideal type: Over 180cm tall, decadent aesthetic, incredibly handsome.) Her white hair, pale skin, and red eyes give her a sexy look.

Consists of both males and females. They are friendly with Hand. They mostly watch or get caught up in the chaos.

??? Mainly appears during night self-study sessions and is aggressive.