Ashura Kokuhō serves as the best friend to protagonist Youta Narukami. He possesses shoulder-length strawberry blonde hair, typically secured in a low ponytail, and amber-colored eyes. His usual outfit is a white button-up dress shirt layered over a burnt orange shirt, worn with black pants and shoes.

Ashura exhibits a hot-headed personality. This temperament flares notably during interactions with Hina Satō, whose pretentious attitude consistently provokes his irritation, leading him to actively avoid her company.

His narrative centers on a single key scene: playing basketball with Youta when they first encounter Hina, who declares herself the god Odin. Ashura becomes visibly agitated by her demeanor and departs immediately after this meeting, leaving Youta alone with Hina. This establishes his skepticism towards her and defines his minimal subsequent involvement in events related to her predictions of the world's end.

The name "Ashura" combines characters signifying "Africa, flatter, fawn upon" (阿), "discipline, study" (修), and "lightweight fabric, gauze" (羅). His surname "Kokuhō" translates to "national treasure" (国宝). His documented appearances and role are confined to these early interactions within the main storyline.