Lee Yoonsun

Yoonsun is a student at Geukji High and a member of Kang Chiu's class, she specializes in strengthening techniques and grappling. They meet each other in the first chapter where Yoonsun shoves past him as she's running to class, hurting him in the process. This causes Yoonsun to develop a strong attraction to him, as she finds weak men attractive and she proclaims that he will be her husband, much to his shock.