- Suzu is a young wealthy teenage girl who is constantly helping Kantarou with his cases. She first met him in episode 1 and after that usually hangs out in his house. She is often addressed as "Suzu-chan". Suzu has a crush on Haruka, but often treats Kantarou harshly. She is good friends with Youko and Rosalie.
Suzu has a fair complexion with shoulder-length brown curls and blue eyes that can sometimes seem violet. Her normal attire consists of a white long-sleeved shirt worn with a vest-like blue top over it. She wears a short deep-blue skirt with knee-length socks and black shoes. Along with her outfit is a red ribbon which is seen sitting on the top of her head.