Lucian Dark has short, bluish-purple hair and black eyes which have a white spot and a brown spot at each bottom corner. He has a fair skin. His hair sometimes looks like a crab pincer. Hikaru seems to be a carefree person, though when he was about to state his surname he had second thoughts telling it. It shows that he's a person who worries about what others might think of him. He also cares for his teammates. He is also rather naive as shown when he was tricked by Kariya Masaki.