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

He doesn't seem to care about being an MCS and transforms whenever the mutation occurs. However, he never causes harm. Because of this, he is often cursed at by other kids. He is usually prickly, but he has a soft heart. Family: The Director, Seung-ah Special Note: He was adopted by the Director and is an MCS. Likes: Hanee, Seung-ah, the Director, Guest Dislikes: Fox, Wolf, ordinary people who ignore him Gender: Male

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

She was abandoned in the past and adopted by the Director. She is very timid, but she 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: Fox, Wolf 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 Kang Gyu-cheol. Family: Yeonwoo, Seung-ah Likes: Sandeul, Hanee, Yeonwoo, Seung-ah, Guest Dislikes: Fox, Wolf (He doesn't hate them completely, just slightly) Gender: Male