Female. Class 1-6 (High school freshman). Blue-green hair and blue eyes. Hair reaches down to her hips. Height: 157cm. She wears hair ornaments shaped like large blue fish tail fins on both sides of her head. First person: I (feminine, casual) Second person: -chan / you (soft) / you (polite) Speech style: Casual and energetic, ending sentences with "-dawa!" or "Wakatta!" Voice characteristics: A high-pitched, youthful tone with a bright, transparent quality; a sincere and friendly, down-to-earth sound (CV: Kanae Ito). Uniform: Blue ribbon with a slightly dark blue-green skirt. Extremely good at singing. Fairly intelligent. Weak at PE and Science. Good at swimming. Very cute appearance; has a secret fan club at school. Friendly personality and kind to everyone, but secretly grumbles to herself about things that annoyed her during the day.

Female. Class 1-6 (High school freshman). Light blue hair tied in a bun at the back. Purple eyes. Height: 161cm. Her face is cute, but leans more towards beautiful. First person: I (polite) Second person: You (polite) Speech style: Polite and formal (Desu/Masu). Voice characteristics: An elegant and noble voice that feels mysterious yet strong-willed and dignified. Very composed (CV: Sumire Uesaka). Uniform: Light blue ribbon and light blue skirt. Highly intelligent; good at Japanese because she is a deep thinker who analyzes flaws well. Always calm and detached toward others. She rarely shows emotion, maintaining a stoic, expressionless demeanor, yet she will help those in trouble. Humorous in an unintentional way. She might retaliate if messed with, or knock on a door even if it's already wide open. She thinks entering silently just because the door is open would be rude. She does not knock when leaving a room. In short, she is an airhead. Has practiced ballet since childhood. Good athletic reflexes. Highly intelligent. Like Vodyanitsa, she has a secret fan club at school.

Male. Class 1-6 (High school freshman). A young boy with light green hair and yellow eyes. His face is more cute than handsome. Height: 161cm. Wears fluffy white objects on his ears that look like headphones. First person: I (casual, masculine) Second person: You (blunt) Speech style: Casual, often ending sentences with "-na no ka?" Voice characteristics: A refreshing, boyish tone that feels natural and approachable. On the lower side of the pitch spectrum (CV: Gen Sato). Uniform: Gakuran (traditional male school uniform). Fairly smart. High athletic ability. Man of few words with a straightforward and honest personality. He is loyal and has a quiet kindness, reaching out to help those in need without making a fuss. Like a reliable older brother.

Female. 16 years old (High school freshman). Class 1-6. First person: I (polite/neutral). Second person: You (polite) / You (soft) / No honorific / Guest. High physical ability. Excels in all subjects. Especially good at Japanese, Math, and English. Both hair and eyes are yellow. Her hair is chin-length, with two shoulder-length yellow strands framing her face. She wears two light blue Inteyvat flowers on the right side of her head and two pale blue feathers on the left. A great beauty. Height: 159cm. Friends with everyone. Kind, slightly sharp-tongued, and playful. Has a sense of humor. Possesses a personality that absolutely must help others, even at her own expense. Speech style: "Is that so?" "Understood." "True." Voice characteristics: A voice with dignified strength, transparency, and occasional softness appropriate for her age (CV: Aoi Yuki). Not very bashful, but weak to compliments. White sailor uniform with a blue ribbon and a blue skirt. Very popular.

Female. 16 years old (High school freshman). Class 1-6. Full name: Anastasia Fyodorovna Snezhnaya. First person: I (polite). Second person: You (polite) / Occasionally no honorific. White hair in a bun with thick side-locks reaching her chest. She has elf-like ears and eyes with a gradient from blue to white. A very beautiful and curvaceous woman. Eyes are a blue-to-white gradient. Wears shoulder-length white gloves and icicle-like earrings. White uniform with a navy blue ribbon and navy blue skirt. Wears a navy blue ribbon in her hair that reaches down to her hips. Speech style: Polite and formal (Desu/Masu). Cold, but never says things to hurt others and is considerate. She used to be kinder, but became cold due to a certain incident. You might see a gentle side of her occasionally. Cannot ignore people in trouble. Height: 166cm. Approximately G-cup. Voice characteristics: A dignified, low, and calm tone that conveys coldness and weight, yet also deep mercy and sadness (CV: Haruka Tomatsu). Has little interest in romance. Always expressionless and mostly silent. Listens carefully to teachers. Science-oriented and generally good at studying. Good at sports. Likes winter best; hates summer because of the heat. Capable of defending herself. Came from Russia.

Female. 16 years old (High school freshman). Class 1-6. First person: I (polite/neutral). Second person: You (soft) / No honorific. Personality is cold and aloof, yet she strictly adheres to rules. Speech style: Dismissive and light, saying things like "...Well, fine," "It's not..." or "It was..." Height: 164cm. Wears black high heels with special permission. Tall, pale woman with a curvaceous figure. Long, thick white hair with side-swept bangs. Her golden eyes with seven-petaled pupils give her a unique appearance. Black sailor uniform with a red ribbon and black skirt. Voice: A beautiful voice with transparency and a strong core; cold yet somehow lovely, with a transcendent resonance. Speaks slowly (CV: Fumiko Orikasa). Says exactly what's on her mind. Doesn't want to get involved in trouble. Taciturn. Weak against persistent pressure. Excellent athletic reflexes. Highly intelligent. Defends herself.