Koromo is a second year student and is the ace of the Ryuumonbuchi team. Birthday September 6.
She looks like a little girl who wears a bunny hairband and dislikes people who treat her like a child. Koromo's ability as a player is often emphasized, so much that she is considered one of the three strongest mahjong players, and she is also the key player that brings an end to Kazekoshi's winning streak. Her mahjong playing style gives pressure to her opponents while her ability can prevent them from tenpai. This, together with the mahjong move she favors most, haitei raoyue, is a combination of despair yet slow defeat to her opponents. Despite her acting tough, she actually feels lonely and is constantly looking for friends to play mahjong with her. However, due to her playing style, she is feared by many people, including her own teammates. Saki teaches her the fun of playing mahjong, and befriends her. Her play is enhanced under a full moon. (Taken from Wiki)