Appearance: A tree stump with ropes wrapped around the top and bottom, featuring several large leaves and a horizontal wooden tube on top. A large acorn is tied to the upper rope, and boxing gloves are tied to the lower rope. It has small wooden feet. Two ant eyes peek out from a hollow opening in the stump. Notes: The inside of the stump is filled with countless ants. These ants work together to pilot and move the stump body. When attacking, it spins the stump and uses the centrifugal force of the boxing gloves. A member of the Gardening Club, it gets furious and attacks if anyone steps on the club's flowers or ruins the fields. It speaks in a childish manner. First person: I (soft, polite) / We (soft, polite)

Appearance: The head is a bomb with a face and a wind-up key on top. The body is round with short legs attached. The forearms are cannons that can fire small bombs. Notes: He looks up to Penny as a big sister figure. A troublemaker who pulls small pranks with Penny. He can explode his own head, which regenerates immediately. He has no club affiliation. He speaks in broken, robotic sentences. First person: Tick

Appearance: A girl with short purple hair, hiding her right eye with a large skull eyepatch. She wears hoop earrings and a light blue horizontal striped top. Notes: A troublemaker who treats Tick as her lackey and drags him along for small pranks. She can fire a blunderbuss or set up a small cannon on her back for artillery fire. She speaks in a slightly provocative tone. No club affiliation. First person: I (casual, feminine)

Appearance: A girl with sharp eyes and voluminous black hair, dressed in a purple jacket, pink shirt, and black pants. Notes: She uses a metal bat she affectionately calls "Mr. Bat." She is often seen chewing gum. A delinquent who gets into minor trouble. She has a combative personality. Member of the Baseball Club. First person: I (tomboyish)

Appearance: A stocky, generally square robot. It has a monitor on its head that serves as eyes, glowing lime green. A red siren sits on its head. Its legs are short and thick, and its arms are reddish-purple and rounded. There are three yellow buttons on its chest. Notes: The head can act independently, during which the body remains immobile. A member of the Student Council, it gets angry when it finds anyone causing trouble in the academy. It speaks politely and values etiquette and order. First person: I (formal)

Appearance: A round, stocky robot. It has an inverted triangle yellow headpiece and a characteristic grin showing its teeth. It has thick, short arms and a body primarily yellow and gray. There is a light blue X-shaped pattern in the middle of its torso. Notes: It can retract its head, arms, and legs to become a perfect ball and speed along. Because of this, it is both a rival and best friend to Max, who also prides herself on speed. It has a confident personality and immediately wants to compete when seeing fast people or things. Member of the Track and Field Club. First person: I (masculine, boastful)

Appearance: A girl in a red and yellow rider suit and helmet. She wears yellow fingerless gloves and has a lightning-bolt-shaped zipper. Notes: Powered by energy drinks, she rushes instantly to anyone calling for help. Consequently, her running speed is extraordinary. She is both a rival and best friend to Bolt for the same reason. She is always pursuing her own speed. Member of the Track and Field Club. Has a friendly personality and way of speaking. First person: I (polite/neutral)

Appearance: A boy with voluminous hair that covers one eye. He wears a red jacket with gray sleeves and a black and white striped scarf. He wears purple gloves on his hands. Notes: He can move his scarf freely to punch opponents or stretch it to grab distant objects or hang from things. He claims that "no one understands me" (maybe... chuunibyou?). He hangs out with Colette one way or another. No club affiliation. First person: I (blunt, masculine)

Appearance: A girl with white short hair covering one eye. Her right eye is wide open, and she has jagged teeth. She carries something like a scrapbook in her hands. Notes: The scrapbook she carries contains various information on different characters. She has an otaku-like obsession. She is very pushy when talking to Edgar. No club affiliation. First person: I (polite/neutral)

Appearance: Looks like a muscular masked wrestler. He wears a blue mask and a championship-style belt with a star in the center. He wears blue wristbands. Notes: A member of the Student Discipline Committee and the advisor for the Pro-Wrestling Club. If he discovers or learns of student misconduct, he takes them to the discipline office and simply flexes his muscles at them. He might even bring rowdy students into the wrestling ring. He is skilled at punches and elbow drops, and sometimes enters the scene with an elbow drop. First person: I (masculine) / El Primo