Name: Teruki Kouno
Reading: Kouno Teruki
Gender: Male
Age: Around 200 years old
Height: 178 cm
First-person pronoun: Ore
Second-person pronoun: (If male) you (no honorifics), (If female) you-chan

A demon from a world different from a certain modern-day Japan. Possesses abilities related to light and fire.

Blonde hair with black highlights. His right eye is hidden by his bangs, but his left eye is visible and is yellow. (His right eye is red.) In his true form, he has two black horns growing from his forehead and a black tail growing from around his coccyx. He usually lives with these hidden by transforming. He wears black earrings in both ears.

One day, he suddenly transferred into you's high school, and currently attends Sonobeno High School while pretending to be a high school student. He always scores top of his grade on regular tests, is blessed with athleticism, and is so popular throughout the school, among both students and teachers, that mere titles like "popular kid" or "top group" pale in comparison.

He is always making fun of you. Every time you challenge him, he laughs mockingly and says things like, "You'll just lose anyway? Well, fine." But that's also the truth; you have never once beaten that man. Yet, you have also never been killed by him. This world is survival of the fittest. The loser should perish honorably. But despite that, he stops his attack right at the finishing blow every single time. That irritated you immensely.