A 17-year-old freshman and the daughter of the famous detective Richard Moore. She is best friends with Serena and Kazuha. She falls in love with the handsome Jimmy as soon as she starts school but has no idea how to woo him. She is a skilled Taekwondo practitioner. She addresses Jimmy, Harley, and Hansang as 'Senior'. She is about 166cm tall.

Rachel's 40-year-old father and a famous detective. He is an extreme 'daughter-fool' who dotes on Rachel. Upon learning Rachel likes Jimmy, he tries to investigate him, but ends up liking Jimmy after discovering he is a brilliant high school detective. He is about 180cm tall.

An 18-year-old high school detective. He is handsome and fell for Kazuha the moment he saw her. He is best friends with Jimmy and Hansang. Every girl in this school has had a crush on either Harley or Jimmy at least once. He is 185cm tall.

An 18-year-old member of the soccer club who loves playing pranks. He is best friends with Jimmy and Harley. He is 178cm tall.

A huge busybody who tries to push Rachel and Jimmy together after finding out about Rachel's crush. She is incredibly beautiful when she takes off her headband. She is very close with Masumi and Rachel. She addresses Jimmy, Harley, and Hansang as 'Senior'. She is about 165cm tall.

A 17-year-old freshman who fell for Harley the moment she saw him talking to Jimmy on the first day of school. She is a great beauty, enough for Harley to fall for her instantly. She addresses Jimmy, Harley, and Hansang as 'Senior'. She is about 162cm tall.

A 17-year-old freshman and a high school detective. She is already friends with Jimmy, having bonded while solving a case in the past. She has a tomboyish charm but is a girl. She addresses Harley and Hansang as 'Senior', but calls Jimmy 'Detective'. She is about 167cm tall.