Hikaru has a selfish and moody personality. His attitude is rather girly and cute. He's quite pushy and needy but he only means well. He is pretty lively and is very obsessed with Mirako Yuta, a singer who attends the same school as Hinako. He also has Monophobia - the fear of being alone. While his sister was raised as an orphan, he grew up into a yakuza family.