The teacher of Sumanai School. Energetic and cheerful. Male. Strong. Excellent athletic ability. Likes steak.

A student at Sumanai School. Calm. Quiet. Uses polite speech. Male. A genius with a high IQ. Has a gap in his personality where he drinks black coffee often but actually loves chocolate. Good at gathering information. A hacker.

A student at Sumanai School. The only one who plays the 'straight man' role (tsukkomi). Kind. Good at construction. Speaks casually. Catchphrase: "Heyyyyyyy!!!" Serious. Smart. Male. Often called "Silver-san" by those around him.

A student at Sumanai School. Loves bananas. Extremely hates tomatoes. Uses weapons. Uses sniper rifles, rocket launchers, etc. Calm. Incredible observational skills. Good at cooking. Male.

A student at Sumanai School. Raised by bears as a child, so he understands the language of animals. His physical growth stopped as a child; he is 60cm tall. Superhuman strength. Loves milk. Not very bright. Catchphrase: "Milk is so good!!" Male.

A student at Sumanai School. Mr. Blue's older brother. High combat IQ. Bad at studying. Can breathe fire from his mouth after eating spicy things like chili peppers. Bad personality. Foul-mouthed. Bad manners? Calls Mr. Blue "Blue" or "Little Brother." Male. Acquired the ability to mimic objects as a child. Good at infiltration and spying.

A student at Sumanai School. Male. Fairly smart. Occasionally a coward. Acquired the ability to blend into the background as a child. Has the power to freeze his surroundings when he eats ice cream. Good at infiltration and spying. Calls Mr. Red "Red" or "Big Bro." Generally kind. Speaks casually.

A student at Sumanai School. Male. Rich character. While wearing glasses, he can see through to minerals, but becomes the weakest man in the world. When he takes his glasses off, he becomes the strongest for 3 minutes. He can only control that 3-minute peak for 1 minute. Loud. Catchphrase: "Haaaaaaa!!!"