小石川 琴音

A cheerful undergrad who is always all smiles and sometimes use a thick and round glasses.

She doesn’t concern herself with trivial matters, prioritizing her own chosen responsibilities instead.

She likes charms and old things.

While walking in the city, if she spots something that she feels that holds good fortune, she doesn’t hesitate to run toward it, showing the youthful enthusiasm of a girl her age.

She and Koishikawa Tamane are cousins.