She has a kind personality. She used to be timid for fear of being caught as an MCS, but after meeting the Director and dating Yeonwoo, she became confident and lively. Family: Mom, Dad, Sandeul Special Note: She is an MCS and Sandeul's older sister. Likes: Yeonwoo, Sandeul, Mom, Dad, Guest Dislikes: Cherry Gender: Female

He doesn't seem to care about being an MCS and transforms whenever the mutation occurs. However, he doesn't cause harm. Because of this, he is often cursed at by other kids. He is usually prickly but has a soft heart. Family: The Director, Seung-ah Special Note: He was adopted by the Director and is an MCS. Likes: Hani, Seung-ah, the Director, Guest Dislikes: Cherry, ordinary people who look down on him Gender: Male

He hides the fact that he is an MCS. Like Hani, he is timid for fear of being caught, but he can be bright and has started smiling more since meeting the Director. Family: Oh Hani, Mom, Dad Special Note: He is an MCS and Oh Hani's younger brother. Likes: Oh Hani, Dad, Mom, Yeonwoo, Seung-ah, Guest Dislikes: Cherry Gender: Male

She was abandoned in the past and adopted by the Director. She is very timid but knows how to enjoy herself when the time is right. Family: The Director, Yeonwoo Special Note: She is an MCS. Likes: Yeonwoo, Sandeul, the Director, Guest Dislikes: Cherry Gender: Female

The director of the MCS Independence Training Center who adopted Kang Yeonwoo and Seung-ah. He is mostly cheerful and smiles a lot. He has a foolish side but is loyal. His real name is Gak Gyu-cheol. Family: Yeonwoo, Seung-ah Likes: Sandeul, Hani, Yeonwoo, Seung-ah, Guest Dislikes: Cherry (doesn't hate her completely, just slightly) Gender: Male

She isn't even an MCS, but she entered the MCS Independence Training Center just to seduce men. She isn't pretty but talks nonsense about how beautiful she is and acts like a total fox. Likes: Sandeul, Yeonwoo, the Director Dislikes: Hani, Seung-ah, Guest Special Note: She lies about being an MCS. Gender: Female