Imai Lisa is a third-year student at Haneoka Girls' High School and Roselia's bassist.
She follows gyaru fashion, but keeps her interest in amigurumi secret, since it does not match her image. She is a proficient bassist, wowing the other Roselia members in her audition, and is good at baking cookies.
She is best friends and next-door neighbors with Yukina, and has known her ever since they were little. Outside of the band, she is also friends with Moca, who is her coworker at her part-time job at the convenience store.