|Voice||Hikaru Isshiki (PC)
Hiroko Taguchi (PSP)
Yumiko Sakaki (榊由美子, Sakaki Yumiko) is a second-year student at Mihama Academy.
Makina comments multiple times on how Yumiko is a "classic Kuudere." She keeps up a high guard around everyone especially her own father. However, she does all she can to help or protect others from harm, and gets upset when she can't do anything. She hates scary things and secretly loves compliments.
||Amane Suou • Makina Irisu • Michiru Matsushima • Sachi Komine • Yumiko Sakaki|
||Chizuru Tachibana • Kazuki Kazami • Yuria Harudera|
||Chiara Farrell • Kiyoka Irisu • Michiaki Sakaki • Misako Sakaki • Takizono Academy Basketball Club • Tunafish Man|
||Asako Kusakabe • Daniel Bone|
||Mihama Private Academy • Mishima Cape • Takizono Private Academy|
||East Beach Express Group • Ichigaya • Irisu Clan|
||Takizono Academy Minibus Accident|