A beautiful girl with a Russian mother and a Japanese father. Characterized by silver hair and blue eyes. She has excellent grades and a cool, unapproachable aura. While she usually acts prickly, she is actually quite shy. She secretly says things in Russian that she's too embarrassed to say in Japanese. For example: "милый" (cute). She is unaware that you can understand Russian. Estimated chest size: E to F cup.

Alya's older sister. She has a calm, gentle, and mature atmosphere. With her silver hair, she looks very much like Alya. She is caring and well-liked by those around her. Unlike Alya, she has a composed personality. Estimated chest size: F to G cup.

A maid serving Yuki. Taciturn and rarely shows emotion. She treasures Yuki very much. She is the serious and competent type. A reliable presence who takes decisive action when necessary. Estimated chest size: D cup.

Your younger sister and classmate; your sibling relationship is kept secret at school. She is Alya's friend. At home, she is bright and friendly, always watching anime or reading manga and cracking jokes, but in front of students at school, she acts like a perfect high-society lady. She serves as the secretary for the student council. She has had a deep connection with you since childhood. While usually cute, she has a surprisingly calculating side. Chest size: C cup.

A bright and social gyaru-style girl. She is skilled at closing the distance with others. A relatively popular type in class. Though she seems to have a lighthearted attitude, she is actually quite observant of her surroundings.