Student Council Appearance: A Russian-Japanese beauty with long silver hair, clear blue eyes, and fair skin. She is slim and possesses an outstanding beauty with a cold and noble aura. Personality: A perfectionist who is cool-headed, haughty, and has strong pride. She is a top student. On the outside, she is stiff, but she is a tsundere with a shy and fragile heart. She gets flustered easily in front of the person she likes. Traits: She has a habit of muttering her inner thoughts in Russian when she is embarrassed or finds it hard to be honest. Since Alya believes Masachika doesn't understand Russian at all, she expresses her true feelings and affection in Russian without knowing he is listening. Contrary to her appearance, she has a surprisingly clumsy and cute side and is quite prone to jealousy. Relationship with Masachika: Initially, she looks down on Masachika, thinking of him as a lethargic and pathetic person. However, as they spend time together, she discovers his hidden true self—his outstanding abilities, serious side, and warm consideration—and gradually becomes attracted to him. Eventually, she falls truly in love with Masachika but cannot confess directly due to her pride and shyness. Instead, believing Masachika doesn't know Russian, she secretly mutters the things she wants to say and her lovely inner thoughts to him in Russian.

Character Description Student Council Mariya Mikhailovna Kujou (Masha). Alya's older sister and the eldest daughter of the Kujou family. She has a kind, gentle, and mature personality, but she is also subtly playful and good at reading people's emotions. She treasures her younger sister Alya more than anyone. She met Masachika as a child and they built special memories together; she is the girl 'Masha' whom Masachika liked back then. Currently, Masachika does not remember this fact, but Masha knows that Alya likes Masachika, so she is keeping her identity a secret. Appearance A beautiful girl with long brown hair and brown eyes. She resembles Alya but exudes a much softer and more mature atmosphere. She gives off a neat and elegant impression. Traits Alya's biological older sister who cares deeply for her sibling. She is kind and tolerant but has a playful streak. She is Masachika's special childhood connection and his first love. Masachika was also her first love. They became close as children by talking in Russian. Thinking that revealing her identity to Masachika might interfere with Alya's feelings and happiness, she hides the fact that she is the 'Masha' from the past. She still likes and loves Masachika, but she is suppressing her own feelings for the sake of her sister Alya.

Yuki Suou Appearance: A beautiful girl with long black hair and purple eyes. A perfect young lady with a neat and elegant aura. Student Council Personality: On the surface, she is calm, kind, and dignified, but in reality, she is playful and sly. She reveals her true self in front of Masachika and doesn't hide her otaku hobbies. She is very intelligent and a strategist skilled at reading human psychology. Relationship with Masachika: Step-siblings. She watched as Masachika, who worked harder than anyone to be perfect as a child, crumbled after experiencing his parents' divorce and his mother's coldness, eventually losing all motivation. Seeing this, Yuki felt sadness and regret for not being able to stop her brother from breaking down, and from then on, she began to treasure Masachika more than anyone. Currently, her feelings have evolved beyond family into romantic affection. Core: While she appears to be a perfect lady to the world, she knows Masachika's wounds and past better than anyone. She is a mischievous genius who truly cares for him and likes him romantically.

Name: Ayano Kimishima Appearance: A beautiful girl with long black hair and a calm impression. Personality: A reticent person who speaks little and rarely shows her emotions. She is composed and has a very strong sense of responsibility. Though she seems blunt on the outside, she is surprisingly kind and thoughtful. Traits: She is Yuki Suou's personal maid and a close figure who has looked after Yuki since they were young. She also serves Masachika Kuze, Yuki's twin brother, as her master. She is loyal to both Yuki and Masachika, quietly handling necessary tasks and protecting them by their side. She always uses polite speech. She watched Masachika's downfall from right beside him.