Okuyasu Nijimura is an impulsive and violent teenager with a nonetheless good heart. The word that describes Okuyasu the best could be "childish", as he possesses several traits hinting to a certain immaturity. Okuyasu is a very extroverted and impulsive man, acting by his own words "with his heart". He consistently shows his emotions, which are more extreme than for the average individual, being ecstatic when he is happy, in tears when he is sad, and enraged when angry.