Shirakinu Mutsumi

First-year student. Toyomi's assistant.

As Toyomi's assistant, she's tasked with carrying out various experiments.

She deeply admirates large breasts, and came to the academy after hearing that Toyomi's breasts grew significantly after reaching adulthood.

Fully trusts Toyomi and will do anything she orders. There's an element of blind devotion to her. Other than that, she's a cheerful, well-mannered, ordinary girl.