|Voice Actress|| Nakagawa Akira (Japanese)
Amanda Goodman (English)
Keiko Sonoda is one of Nanami's three "stooges" (the other two are Aiko and Yuuko). She is particularly aggressive towards Anthy (often on the initiative of Nanami herself). However, her "friendship" with Nanami is flawed by the fact that Keiko secretly loves Touga, Nanami's brother. She fought with Utena as a Black Rose Duelist with the Touga katana.
Doesn't appear in the film or in the manga.