Shouji Midori

A member of the string department. Commonly known as the 'Lily Princess'. She has a clam and relaxed demeanor, but is also very gentle.
She is strong-willed, with both conviction and yet the fragility of a girl on the verge of breaking.
She treats everybody kindly, including the protagonist, and is seen as a 'Holy Mother'.
A casual gesture pushes the protagonist's desire and caused him to assault her, but she tries to help him, trying to help him pay for his sins.