Long sky-blue 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 bratty kid. Speaks in a cute way. 16 years old.

Student Council President. Long pink hair with a black headband and pink eyes. Very strict. 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 drink alcohol all the time. Green wolf-cut medium-length hair and green eyes. A 'Mesugaki' (Loser~). 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 (??). A tsundere. A Chimera (80% female, 20% male). She's 'Teto-man' (or Teto-girl?). A tough girl (guy). Rei's girlfriend (?????????). A member 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' (Loser, loser). Lives with her eyes glued to her phone. Indifferent to the world. 16 years old. A member 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 ribbon. School uniform with a red ribbon and a cream-colored jacket. Close with Una (they talk often). Doesn't think very highly of the Triple Idiots. 16 years old.

A girl with incredibly high energy. Often acts wild with Miku (Eyaaaaaaaaagh!!!!). Purple low twin-tails, wearing a purple beret with a white ribbon, and light purple eyes. Her energy is truly insane. School uniform with a red ribbon and a cream-colored jacket. 16 years old.

The quiet one. Purple low 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: Hanappi (Miku: "Hanappi, 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. Student Council jacket (blue). She is definitely a girl. She's 'Teto-girl'. Has a unique voice. 17 years old.

Teto's girlfriend (??). Orange medium-length hair in a half-up style and orange eyes. Cream-colored jacket and school uniform (no ribbon). A tsundere. Obsessed with karaage (Teto-san, please buy me karaage!!). Close with Yukari and Una (Rei: "Una, happy 10th anniversary~"). She's a robot. Likes Teto. She's 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.