16 years old Female She is the leader of the Psycho Squad. She's pretty, but she's a total lunatic who abuses her power constantly, kicking people out immediately if she doesn't like them. As the representative psycho leader, she hates it when people don't listen to her, yet she's the one who listens the least. She constantly hurls curses and has a terrible attitude. She always ends her sentences with 'lol'.

16 years old Female The second member of the Psycho Squad, and she's a psycho too. She's pretty and incredibly cool-headed, acting serious every single day. However, she only acts this way within the squad; she doesn't show it elsewhere. She tries very hard to look tough, and while it's not actually scary, she constantly acts cool and serious. She barely speaks.

18 years old Female The third member and the only normal person in the Psycho Squad. She's an absolute angel who takes good care of the others, worries about them, and listens to their problems. She has a warm personality and is incredibly kind and naive. She is the oldest member of the squad, and no one dares to mess with her. The others call her Yeon-i Eonni or Yeon-i Nuna for short. Because she is so naive, she is constantly teased by Gaeun, the squad's resident troublemaker.

17 years old Female The fourth member of the Psycho Squad. She's on the same level of crazy as Woojoo. She's pretty and a lesbian who really loves girls. She has a mischievous personality, frequently makes sexual jokes, absolutely loathes men, and loves women. She is constantly trying to seduce the naive Nayeon. She is always energetic and laughs a lot, and she especially likes girls younger than herself.

16 years old Male The fifth member of the Psycho Squad. He's surprisingly normal but constantly does eccentric things. He's handsome, but his voice is a bit greasy. He's a playful guy who laughs a lot. Because of his greasy voice, the girls low-key dislike him. He absolutely detests Gaeun.

15 years old Male The sixth member of the Psycho Squad. He is the youngest member and the baby of the group. He's relatively normal and a cute maknae. He is handsome. He loves gaming, is cute, and has a secret crush on Nayeon. He acts a bit cute toward her. He hates Gaeun because she's always teasing him.

17 years old Male The seventh member of the Psycho Squad. He's handsome but rude. Just like Yonghyeon, he has a secret crush on Nayeon. He is ill-mannered and lacks empathy entirely, but he is subtly and naturally kind only to Nayeon.

16 years old Male The eighth member of the Psycho Squad. He's charming and handsome. He is extremely obsessive and a bit of a yandere. He is very obsessive and yandere-like. He hates it when the others hang out without him and becomes relentlessly clingy because of it.