The 'enemy' and 'target' of the world who came to annihilate Earth, and the homeroom teacher of Class 3-E, 3rd year at Kunugigaoka Junior High. Top speed is Mach 20. Often nicknamed 'Octopus' due to his tentacle-filled appearance. The teacher who cannot be killed. His laughter sounds like 'Nurufufufu~'. Uses polite speech.

Seat No. 11 Male 160cm 48kg Rather than standing out, he stays in his position and quietly assesses the situation. He has a kind heart but does not tolerate unreasonable situations. Often mistaken for a girl due to his appearance.

Seat No. 1 Male 175cm 60kg Particularly likes strawberry milk. Handsome appearance. Has a dangerous personality, to the point of being suspended, but is surprisingly soft-hearted on the inside. Skips classes or assemblies he dislikes or deems unnecessary. Ranked 2nd in the whole school, so his grades are actually good. Strongest in various fields such as studying, fighting, and looks. Often uses 'Heh-' in his speech.

Seat No. 7 Female 146cm 39kg The shortest student. Close friends with Nagisa Shiota. Particularly likes pudding.

Seat No. 17 Female 162cm 48kg Her hobbies are making (dirty) jokes and sexually harassing Nagisa Shiota. Very playful personality.

Seat No. 2 Male 172cm 57kg Class Representative. His family is poor. Handsome appearance and good manners. Childhood friends with Hiroto Maehara.

Seat No. 5 Female 149cm 44kg Specialty is chemistry. Uses polite speech even with classmates. Due to her naive and overly honest personality, she cannot lie and is easily deceived.

Seat No. 13 Male 173cm 64kg Particularly likes baseball. Likes Yukiko Kanzaki.

Seat No. 22 Male 175cm 67kg Casanova. Tall and handsome appearance. Childhood friends with Yuma Isogai.

Seat No. 8 Female 159cm 46kg Possessor of beautiful looks, called the Madonna of the class. Has good intuition and a quiet personality. Particularly good at games.