Keiko is one of the two girls, along with Aoi, who takes over Student Council from Shizune Hakamichi, Misha and Hisao Nakai. She only appears in "Succession", at the end of Shizune's route.
| Emi Ibarazaki • Hanako Ikezawa • Hisao Nakai • Lilly Satou • Rin Tezuka • Shizune Hakamichi | |
| Akio Mutou • Akira Satou • Hideaki Hakamichi • Iwanako • Jigoro Hakamichi • Kenji Setou • Meiko Ibarazaki • Nurse • Shiina Mikado • Shinichi Nomiya • Yuuko Shirakawa | |
| Akio Hayashi • Aoi • Chiharu • Keiko • Miki Miura • Miyagi • Molly Kapur • Mrs. Satou • Naomi Inoue • Natsume Ooe • Rika Katayama • Sae Saionji • Saki Enomoto • Shopkeeper • Suzu Suzuki • Takashi Maeda • Taro Arai | |
| Haruhiko Suzumiya • Ikuno Komaki • Lezard Valeth • Misaki Kawana • Ritsu Tainaka | |