Ozuma Kohinata is a second-year high school student and the older brother of Iroha Kohinata. He is a kind and caring individual, often attentive and considerate, fitting the archetype of a "nice guy." Ozuma is noted for his handsome, prince-like appearance and is an exceptionally skilled genius programmer.

He is the best friend of Akiteru Ōboshi and is recognized as Akiteru's only friend. Ozuma places absolute trust in Akiteru, a sentiment rooted in certain past events. His family consists of his mother, Otoha Kohinata, and his younger sister, Iroha.

The name Ozuma means "witty, spicy, chic, second in rank, quaint" and "horse," while his surname, Kohinata, means "small" and "sunny place."