Sayo Kotobuki is a supporting character in Gals! and Super Gals!. She is Yamato Kotobuki and Ran Kotobuki's younger sister, she wants to grow up to be a cop much like her parents. She is currently dating Masato Iwai, where they play Junior Detectives from time to time.
Voice: Rei Kumigiya , Jo Anne Orobia Chua (Filipino) & Hilary Haag (English)