Luceus is one of the Captains of the Royal Guard of Arba, and wields a sword and shield in his sworn duty of defending the kingdom, and its king. He is an intellectual individual, always coming up with strategies to sway the course of battle in his and his allies' favor. He can cast spells and heal himself, albeit doing the latter to a minute extent — unless he has a healstone, in which it is more effective. Grew up alongside Aurora, and a healslime named Healix.