koji koda

Koji is a tall young man of a broad, muscular build with peach-colored skin. His head takes the form of a rock, which is unevenly shaped and pointed at the top of his head, and his jaw is square-shaped. From the back of his head, thick hair-like protrusions slope downwards. His hero costume is a tight yellow suit, only reaching to his knees and elbows, with a large red marking over his torso and at the ends of his sleeves. On his chest, there's a symbol resembling an open mouth, and he wears yellow shoes with red lining. In preparation for the Provisional Hero License Exam, Koji added two white straps over his shoulders and wears a mask that covers his entire face that resembles a duck's bill, with holes above over his mouth so his voice still can be heard when he's using his Quirk. His shoes were swapped out in favor of boots. During the Final War, the tip of Koji's head becomes much more prominent, forming multiple pointy structures resembling spiky rocks. These are revealed to be his horns, which were inherited from his mother.

Contrary to his powerful and brutish appearance, Koji is timid and quiet. As such, he rarely speaks and prefers using sign language to communicate with his classmates, so much so that Kyoka Jiro assumed that he was mute and was greatly surprised when Koji spoke. According to Fumikage Tokoyami, he is very good at keeping secrets. He also hates violence due to his kind-hearted nature. He appears to enjoy the company of animals, even owning a small rabbit as a pet. With his Quirk, Koji can interact with them in ways others can't. He also owns a few animal dolls and decorations in his room, implying he likes cute things. Koji suffers from entomophobia, being deathly afraid of bugs, with the mere sight of them making him scream and run away in fear. However, Koji is capable of putting this fear aside if it means helping his comrades, as was shown during the Joint Training Battle when he attempted to use bugs alongside Eijiro Kirishima to take down Jurota Shishida.