月社 妃

"I wanted to be proudly in love with my elder brother."

Class 2, Grade 3, Takayama School

Despite being a full younger sister of the protagonist, she is using her mother's family name, Tsukiyashiro.

She is a smart girl and a sharp-tongued eccentric. She disguises her conscending attitude towards things and behaves herself in public, and has thus won fame and popularity at school; her real side is revealed only to her loved ones.

She never shows weakness to others, and keeps an unhurried manner. Nobody understands her worries hidden under her constant smile.