Hatsumi Usuzumi is a supporting character in the anime and manga series 'Saki.' She is a member of the Shiraitodai High School mahjong team, known for her calm and gentle demeanor. Despite her petite and youthful appearance, Hatsumi is highly skilled in mahjong, specializing in using the first few draws of the game to her advantage. Her strategic play style and unique abilities make her a formidable opponent and an important part of her team's lineup in national tournaments.