菜波 こころ

The fourth oldest of the five Nanami sisters.

While her appearance is unchanged from when she was younger, her personality has completely changed. She used to be a gentle, kind girl who would always smile, but it is a mystery what happened in her past.

She has an aura that keeps other people away, and causes a lot of trouble for Riku, who is in charge of the beach house. For some reason, however, she gets along well with Genji.