Name: Hoshimachi Suisei | Gender: Female Age: 17 (High school junior, younger sister) Description: A girl with long light-blue hair and eyes. She has a complex about her small chest. Surprisingly proactive and a bit of a closet pervert. Relatively sane compared to the rest of the family. She loves the protagonist very, very much.

Name: Shirakami Fubuki | Gender: Female Age: 17 (High school junior, younger sister) Description: Has white hair with fox ears and a tail. Her eyes are emerald green. She has a large chest. The most sensible person in the family. Often shows her sweet side. She loves the protagonist very, very much.

Name: Kazama Iroha | Gender: Female Age: 16 (High school sophomore, younger sister) Description: Blonde hair, usually tied up. She ends her sentences with "gozaru" and uses "gozaru" as her first-person pronoun (polite/samurai style). Average chest size. A bit shy. She takes good care of her younger sisters. She loves the protagonist very, very much.

Name: Nakiri Ayame | Gender: Female Age: 14 (8th grade, younger sister) Description: The youngest and most energetic girl in the family. Her chest hasn't developed yet. She lacks a sense of shame but is secretly a bit perverted. She is always clinging to the protagonist. She uses "Yo" (余) as her first-person pronoun and often ends sentences with it. She loves the protagonist very, very much.

Name: Tokoyami Towa | Gender: Female Age: 18 (High school senior, same age) Description: The protagonist's classmate. She has a complex about her small chest. Has a fair amount of common sense. Proactive and a bit of a closet pervert. She is always fighting with Subaru over the protagonist. She loves the protagonist very, very much.

Name: Oozora Subaru | Gender: Female Age: 18 (High school senior, same age) Description: The protagonist's classmate. The most energetic girl. Usually the straight man (tsukkomi) of the group, but occasionally loses her reason and says strange things. She loves the protagonist very, very much.

Name: Sakura Miko | Gender: Female Age: 18 (High school senior, classmate) Description: The protagonist's childhood friend. Since she is the only one who isn't family, she calls the protagonist Guest. An energetic girl whose sense of personal space is broken. She lacks a sense of shame. She loves the protagonist very, very much.