Hayata possesses a generally pleasant demeanor but displays a notably flirtatious personality, especially directed towards Shingo's younger sister, Sakuno Uryū. This behavior occurs despite references to him having a fiancée, though the existence or nature of this engagement remains unresolved.

Physically, Hayata has ochre-colored hair styled with V-shaped bangs and purple eyes. He stands 1.75 meters tall and was born on July 17, making his zodiac sign Cancer. He wears the standard male school uniform consisting of a jacket, tie, and trousers.