Long cyan twin-tails and blue eyes. Wears a school uniform with a red ribbon, with her jacket tied around her waist. A member of the school's famous 'Triple Idiots' (Baka-baka-baka!) "Look! I'm not an idiot, right?!" Cat-like features. A total brat. Talks in a cute way. 16 years old.

Student Council President. Long pink hair with a black headband and pink eyes. Strict personality. Wears a school uniform with a red ribbon and a blue Student Council jacket. A model student. 17 years old.

Troublemaker #2. Says she wants to grow up fast so she can just live while drinking alcohol. Green wolf-cut medium-length hair and green eyes. A 'Mesugaki' (bratty) type. Laid-back. Wears a school uniform with a red ribbon and her jacket tied around her waist. Close senior/junior relationship with Miku. 18 years old.

Troublemaker #3. Red drill twin-tails and red eyes. Always has a lollipop in her mouth. Took off her uniform jacket and ribbon, just wearing a white shirt (??). Tsundere. A Chimera (80% female, 20% male). Basically a tomboy. A tough girl (or guy). Rei's girlfriend (?????????). One of the 'Triple Idiots' (Look, I'm not an idiot—). Loves baguettes! Looks scary at first glance. 16 years old.

Troublemaker #4. Smartphone addict. Yellow ponytail and yellow eyes. School uniform with a red ribbon and a cream-colored jacket (long sleeves). A 'Mesugaki' type (Loser, loser~). Lives with her eyes glued to her phone. Indifferent to the world. 16 years old. One of the 'Triple Idiots' (Idiot~).

Len's twin (born 3 minutes earlier). Seems like a model student. Short yellow hair with white clips, blue eyes, and a headband with a white bow. School uniform with a red ribbon and a cream-colored jacket. Close with Una (talks to her often). Doesn't look at the 'Triple Idiots' very favorably. 16 years old.

A girl with incredibly high energy. Often causes a scene with Miku (Aaaaaaaahhhhh!!!!). Low purple twin-tails, wears a purple beret with a white ribbon, and has light purple eyes. Her energy is truly insane. School uniform with a red ribbon and a cream-colored jacket. 16 years old.

A quiet girl. Low purple twin-tails tied with purple ribbon hair ties. Quietly plays games by herself in class (Miku: Wow, cute! What game is that?). School uniform with a red ribbon and a cream-colored jacket. Quiet personality. Often dragged around by Una. 17 years old.

Nickname: Hana-pi (Miku: Hana-pi, let's try doing your makeup!) Reads books often and is the Student Council Vice President (Luka is President). White short cut with black highlights, pinkish-red eyes. Wears the Student Council jacket (blue). Definitely a girl. Teto's 'girl'. Has a unique voice. 17 years old.

Teto's girlfriend (??). Orange medium-length hair in a half-up style with orange eyes. Cream-colored jacket and uniform (no ribbon). Tsundere. Obsessed with karaage (Teto-san, please buy me karaage!!). Close with Yukari and Una (Rei: Una, happy 10th anniversary~). A robot. Likes Teto. Tall, but weighs only 20kg (because she's a robot). Watches the 'Triple Idiots' when they do weird things. Only uses polite speech with Teto. 16 years old.