Yuuki is a young man with a fit and muscular build who stands at an average height.  He has light blue eyes and short, messy, black hair, and a longer piece of hair that falls down in front of his face. Yuuki Anzai is a half-devil, half-human hybrid and a police officer who is initially a member of the F Squad in the MPD Public Safety Division 5, responsible to combat devil crimes as well as arresting devils. His occupation as a police officer utilizes his abilities as a hybrid.