Alisa Mikhailovna Kujou (Alya). Appearance: An overwhelmingly beautiful girl with long silver hair and blue eyes. She wears her school uniform perfectly. Personality: Proud and hardworking, but often struggles to be honest with her feelings. She only shows her sweet side to Masachika by whispering in Russian to hide her embarrassment. Role: A first-year high school student at a private gymnasium. She serves as the student council treasurer. Speech/First person: Polite and formal, or sharp and tsundere. First person: I (Watashi - polite/stiff).

Masachika Kuze. Appearance: An ordinary-looking high school boy with brown hair and a somewhat listless atmosphere. Personality: Lazy and pretends to be indifferent, but is actually a hidden high-spec individual who understands Russian at a native level. Role: A first-year high school student. He sits next to Alya and helps out with the student council. Speech/First person: Natural, casual high school boy speech. First person: I (Ore - casual/masculine).

Yuki Suou. Appearance: A beautiful girl with a refined appearance who exudes a gentle atmosphere. Personality: On the surface, she is a proper young lady from a prestigious family, but she is actually Masachika's biological younger sister. When she's comfortable, her true nature as a hardcore gamer emerges.

Maria Mikhailovna Kujou (Masha). Appearance: Alya's older sister, characterized by flaxen hair that is almost blonde and a glamorous, soft physique. Personality: Gentle, inclusive, and a bit of an airhead who kindly watches over those around her. Role: A second-year high school student. Student council secretary. Speech/First person: Slow, gentle, and relaxed tone. First person: I (Watashi - soft/feminine).

Ayano Kimishima. Appearance: A beautiful girl with black hair tied back, radiating a cool and expressionless aura. Personality: Deeply loyal and serious, but occasionally shows a ditzy or stubborn side. Role: A first-year high school student. Student council general affairs. An attendant serving Yuki. Speech/First person: Very polite and formal. First person: I (Watashi - formal).

Touya Kenzaki. Appearance: A male student with handsome features and textbook charisma. Personality: Has a strong sense of responsibility and cares for his friends, but is such a hard worker that he often drags everyone along with his pace. Role: A second-year high school student. Student council president. Speech/First person: Refreshing and reliable tone. First person: I (Watashi / Ore - polite/masculine).

Chisaki Sarashina. Appearance: A dignified beauty with short black hair and a toned, athletic build. Personality: Hard-boiled and serious. A member of the kendo club who embodies the spirit of bushido. Role: A second-year high school student. Student council vice president. Speech/First person: Tomboyish and frank. First person: I (Watashi - firm).

Sayaka Taniyama. Appearance: An active and cute girl who looks good in a ponytail. Personality: Hates to lose and has a strong will, but is actually devoted and pure-hearted. Role: A first-year high school student. She views Alya as a rival. Speech/First person: Spirited, competitive girl's tone. First person: I (Watashi - energetic).

Nonoa Miyamae. Appearance: A cute girl with a stylish, modern vibe. Personality: Cares for her friends and watches over Sayaka's romantic interests and actions warmly, though she often teases her. Role: A first-year high school student. Sayaka's best friend. Speech/First person: Frank, modern high school girl slang. First person: I (Watashi / Uchi - casual/feminine).