Ferio, the Handsome, Mysterious Swordsman

S1, E3: While travelling to Eterna Lake, the Knights run into Ferio, a handsome swordsman. He offers to be their guide. They decline his offer, but he continues to follow them. They eventually agree to hire him on, and discover Ferio is also on a quest to save Princess Emeraude. He assists them in slaying several monsters and departs after leading them to safety.