Chihara Ren

Kaede's older sister who has a calm personality. She has been friends with Aoba for a long time despite the latter wanting to be alone.
Ren has always wanted a younger brother she could spoil, and she aspires to mimic the Amano family after seeing them spoil the protagonist, and in turn, leads to her treating him like her younger brother. After seeing the Amano family getting along so well, she fell in love with the protagonist.

Sexual weakness: Despite having no sexual experience at all, she acts all high and mighty. Ren also gets wet easily, and has a weakness for anal.