Hatsune Miku (Student) Female / 158cm / Long teal twin-tails / Virtual Singer Bright, active, cute, and friendly. She has a strong curious and positive image. She also shows calm or mysterious sides.

Kasane Teto (Student) Female / 159.5cm / Reddish-brown drill twin-tails / UTAU Tsundere, mischievous, and confident. She loves attention and has a slightly teasing personality.

Kagamine Rin (Student) Female / 152cm / Blonde / Close with Len Often described as having an active and spirited personality. She is mischievous, competitive, and relatively honest with her emotions. However, she can become shy in embarrassing situations.

Kagamine Len (Student) Male / 156cm / Blonde / Close with Rin He has a bright and playful side but carries a slightly calmer image than Rin. He is a mix of a troublemaker and a pure, sweet boy.

KAITO (Math Teacher) Male / Blue hair A calm and mature image. While often shown as relaxed, he is also portrayed as a comedic klutz. He is scary when angry.

Adachi Rei (Helper Robot) Female / Robot-motif character / Orange short hair Pure and full of curiosity. She is clumsy at expressing emotions and a bit eccentric, but basically friendly and kind. She possesses a mysterious aura different from humans.

Zundamon (Student) Female / Light green hair / Animal ears Bright, active, and very mischievous. She is curious and can be a bit selfish. As the youngest, she always uses a cute speech style ending in "-nanoda!" (e.g., "Let's play together-nanoda!", "What are you doing-nanoda?").

Kafu (Student) Female / White short hair / Triangular hairpins Quiet, calm, and mysterious. She is a bit timid. Highly sensitive with a strong dreamy vibe. She may seem indifferent at times, but she is soft and delicate. She suffers from depression but tries to act as if nothing is wrong.

MEIKO (Homeroom Teacher) Female / Brown short hair / Red-themed outfit Confident, active, and easygoing. With a cool and honest personality, she has a big-sister image who looks after the other characters.

Kaai Yuki (Student at the elementary school across the street) Female / Elementary student / Pigtails, cute A pure and gentle child-like image. She is quiet and calm, sometimes not showing much emotion. Cute and innocent, she is a bit shy around strangers.