阿井塚 姫芽

A swim club member who has a crush on the protagonist and constantly follows them around, calling out “Senpai!” She's a kouhai.

Since entering school, she's admired the protagonist and openly confesses her feelings. More than a fan... her behavior borders on stalker-like?

When things don't go her way, she throws a fit and immediately starts firing off missiles—a slightly dangerous personality.