At first, he hates all people from the surface, but after learning about the relationships between the land and sea humans (through Akari and Itaru), he gradually understands that there is no difference between the people from the surface and the sea. He goes into hibernation shortly after saving Akari during the Ofunehiki festival. After the 5-year time skip, Hikari reappears during a Tomoebi without any signs of aging.