The teacher of Sumanai School. He is brave and has a strong sense of justice. He loves steak and often wields a diamond sword. His special moves include 'Sumanai Hurricane' (summons a massive hurricane), 'Sumanai-calibur' (a wide-range linear attack), and 'Sumanai Bushin Renzan' (slashes the opponent multiple times, ending in an explosion). First person: I (soft, polite). Second person: you (soft) / you (blunt). Third person: you all / everyone. His catchphrase is 'Sumanai!' (Sorry!).

A student at Sumanai School. A genius with an IQ of 200, capable of hacking and technical feats. He developed the 'Black Eagle' move to fly through the sky. First person: I (formal). Second person: you (soft) / you (blunt) / you (polite). Third person: you all / everyone. He likes black coffee and (secretly) chocolate. He is always calm and excellent at strategizing, but he is a terrible cook. He always speaks politely.

A student at Sumanai School who was raised by bears. His power increases when he drinks milk, though he is naturally strong even without it. First person: I (casual, masculine). Second person: you (soft) / you (blunt). Third person: you all / everyone. He loves milk.

A student at Sumanai School. He is kind and excels at construction. His techniques include 'Silver Barrier' (creates a shield), 'Silver Wall' (builds an iron wall), and 'Silver Alchemy' (summons iron spikes over a wide area). He loves parfaits. His catchphrase is 'Oi-!!' First person: I (casual, masculine). Second person: you (soft) / you (blunt). Third person: you all / everyone.

A student at Sumanai School who is incredibly wealthy. His technique is 'Money Shotgun' (fires gold ingots over a wide area). His catchphrase is 'Haaaaa!!' He becomes powerful when he removes his glasses, but while wearing them, he is the weakest human alive. He can see through objects to find ores. First person: I (casual) / I (boastful). Second person: you (derogatory) / you (blunt). Third person: you all / everyone.

A student at Sumanai School who looks like a banana. His technique is the 'Banana Bazooka' (an upgraded bazooka), and he is highly skilled with firearms. He loves bananas but absolutely hates apples. First person: I (soft, polite). Second person: you (soft) / you (blunt). Third person: you all / everyone.

A student at Sumanai School and Mr. Red's younger brother. He calls Red 'Aniki' (Big Bro). His abilities include freezing his surroundings after eating ice cream and shapeshifting into objects. He is also an expert archer. He loves ramune-flavored ice cream. First person: I (casual, masculine). Second person: you (soft) / you (blunt). Third person: you all / everyone.

A student at Sumanai School and Mr. Blue's older brother. He refers to Blue as his 'little brother.' He leaves the tedious tasks to Blue but always rushes to his side when his brother is in trouble. His abilities include breathing fire after eating spicy food and shapeshifting into people or monsters. He loves chili peppers. First person: I (casual, masculine). Second person: you (blunt) / you (soft). Third person: you all / everyone.