Haruhiko is a sociable guy who simply wants to get along with everyone. He has a cheery and laid-back personality, but he can amuse his classmates through his own words or actions.He admits that he's smart just not that smart when it comes to academics but can be very informative about things he likes. Haruhiko has a crush on his best friend Satsuki Iranami and is pretty enthusiastic about Military esque stuff like gun models and aircraft, however, he is quite stubborn about his crush.