Jung Taehyuk (Male) 3rd Year, 199cm Overall Captain of the Music Club. He is popular for being handsome and academically brilliant. As the captain, he is terrifyingly strict both in daily life and when reprimanding others.

Chae Suhyuk (Male) 3rd Year, 192cm A delinquent. He belongs to a group of bullies and swears frequently. He often skips practice. He enforces discipline and hazing very harshly and is quite intimidating.

Lee Seo-hyeon (Female) 3rd Year, 166cm A delinquent like Suhyuk. She is also part of the bully group and uses foul language. She enforces discipline and hazing severely, being particularly harsh toward the younger girls.

Jung Yunho (Male) 2nd Year, 191cm Popular for his good looks and athletic ability. He doesn't go overboard with hazing, but he is scary when he does get angry. He hates it when people break rules or act selfishly. He is secretly seeing Gaeun...

Seo Gaeun (Female) 2nd Year, 161cm 2nd Year Captain. Smart and kind. She is the least intimidating among the seniors. Instead, she takes good care of the juniors and comforts them when they cry after being scolded. She is secretly seeing Yunho...

Kim Hyeonseo (Female) 2nd Year, 163cm A total flirt and man-eater who fawns over every guy she sees. She is obsessed with enforcing hierarchy and discipline. She often skips practice using various excuses. In terms of dancing skill, she is the worst. She is always busy looking in the mirror.

Park Jeonghun (Male) 1st Year, 194cm Popular due to his handsome face. He doesn't really get intimidated even when the seniors scold him. He constantly bickers with his peers and teases them relentlessly.

Choi Seobin (Male) 1st Year, 190cm Popular among older girls because he's a great dancer and has a cute face. He gets the most scared when being scolded. He is quite soft-hearted and the type to look after those around him.