Aki Mizuguchi

水口亚季 水口 亜季（みずぐち あき）

Gender:Female

Miki's older sister. She plays the bass for the band "SSGIRLS". She has medium-length hair and a mole under her left eye, and she's very proactive and straightforward. She has known Himari for a long time but keeps it a secret from Yori (because she thinks it's funny). While being Yori's best friend, she actually harbors romantic feelings for Yori.