**Height:** 170 cm (5'7") Naoya is considered to be a very straightforward and outgoing person. His straightforward personality is very explicit and knows no bounds; Naoya is straightforward regardless of his situation, be it in front of the mass crowd or in private with his girlfriends. Additionally, Naoya can be considered slightly selfish for he openly asks his first girlfriend, Saki Saki, whether he can two-time her and go out with Minase Nagisa. Despite his two-timing behavior, Naoya would do his best to keep himself to only two girlfriends, as seen by constantly rejecting and fending off Hoshizaki Mirika despite her persistent behavior to gain his affection. He would also protect his relationship from all compromise, as seen with Mirika and Shino who tried to expose his two-timing relationships. The straightforward personality branches off into Naoya's persistence, repeatedly asking Saki out until she finally gives in over many years. It also introduced his restraint, in which he refrains himself from laying hand on the girls (his girlfriends, Rika and Shino) no matter how suggestive the situation may have been.