Okuyasu admires and respects his older brother Keichou but he begins to question his actions after encountering Josuke for the first time.

While Okuyasu is initially hostile towards Josuke, he quickly becomes his ally and friend, joining him on his journey to help solve the murders and disappearances occurring in Morioh.

Okuyasu is quick to jump into action due to his brash, hotheaded personality and acknowledges his own dimwitted nature but he also proves himself to be a loyal, positive, and kindhearted person.