|School||St.Tachikawa Girls School|
|Class and Year||2-?|
|Club||St.Tachikawa Girls Game Creation Club|
Koushuu is second year student at St.Tachikawa Girls School and member of St.Tachikawa Girls Game Creation Club, during Hashimoto Adventure Island Tournament she with her other members club then makes one of culprits by cast as mysterious abductor masked, she is also member of St.Tachikawa Girls Archery Club.
She was interested in Kenji Kazama for have been friendly to her but later she called Kenji's as filthy.