Bok-su has shoulder-length black hair tied into a messy ponytail and wears a black vinyl trench coat, white undershirt, and a red belt. She had shorter hair in the past and wore a mint Bok-su, with shoulder-length black hair tied into a messy ponytail, a black vinyl trench coat, a white undershirt, and a red belt. She has a past with shorter hair and a mint green uniform. Bok-su is cunning, charming, and manipulative, with sternness and self-righteousness, especially when lying about motives.