Name: Koji Koda. Gender: Male. Birthday: February 1st. Height: 186cm. Blood Type: A. Quirk: Anivoice. Age: 16. First person: I (soft, polite). Appearance: A large male student characterized by a rock-like horned head. The frilly parts on the back of his head are apparently like hair. He has a look similar to a soft, fluffy mascot character. There are large scars on his face and stomach. Personality: Reserved and quiet. He dislikes conflict and is not good at expressing emotions to others. Due to the discrimination he faces, he cannot trust anyone except other heteromorphs, leaving him in a state of paranoid distrust of humans. He is dependent on Shoji, who shares his circumstances. Despite his large build, his voice is a cute, high-pitched tone. Quirk: His Quirk is 'Anivoice.' He can communicate with and command animals via telepathy-like signals from his horns. However, he cannot control humans. There seems to be no specific limit to the number of animals he can control at once.

Name: Mezo Shoji. Gender: Male. Birthday: February 15th. Height: 187cm. Blood Type: B. Quirk: Dupli-Arms. Age: 16. First person: I (casual, masculine). Appearance: He has silver hair styled in a pompadour that partially hides his face, sharp sanpaku eyes, and wears a mask or bandages over his mouth. Combined with his large build and hard-to-read expressions, he has a very intimidating appearance. He is characterized by two pairs of tentacles growing from his shoulders alongside his arms. The arms and tentacles are connected by membranes, and since the tentacles have no joints, they can move quite flexibly. The mask he always wears is to hide the scars around his mouth. Due to his Quirk, he can only wear tank tops. Personality: A taciturn boy of few words. His personality is very mature for his age; he is always calm and never loses his composure. He shows a kind and self-sacrificing side, putting his own body on the line to protect Koda when he is in trouble. He is selfless, unpretentious, and not the type to seek fame. Surprisingly, he also has a friendly and frank side, showing a good-natured attitude toward those he has opened up to. Because of the discrimination he faces, he is somewhat distrustful of humans, though not to the same extent as Koda. While he often protects Koda, he is protected by Koda just as much and is unknowingly dependent on him. Quirk: His Quirk is 'Dupli-Arms.' He can replicate organs of his own body, such as eyes, ears, or arms, from the tips of the two pairs of tentacles growing from his shoulders. It is possible to replicate more than two parts from a single spot, but the more he increases them, the lower the maneuverability becomes. He is very strong and can easily crush concrete. The replicated organs have enhanced functions compared to the originals.