Haruhiko is a sociable guy who simply wants to get along with everyone. He has a cheery and laid-back personality, but he can also amuse his classmates, either through his own words or actions. He admits that he's not very smart when it comes to academic knowledge, so he may have a hard time understanding anything that looks complicated to him at times. Haruhiko is also a military enthusiast, and he is fond of collecting imitations of gun models