Yuuko is one of the Kitsune from the Unseen Village on the Verge. His name means 'courage', which reflects his personality as a brave, bold and at times foolhardy warrior. He is a handsome, muscular, dark-grey humanoid fox with proud posture; he has orange tattoos on his right arm, from shoulder to wrist, and he wears flowing, layered garments. With a deep and warm voice, he speaks an ancient-sounding Sylvan dialect (reflected by the usage of older English). He can assume the shape of a fox.
A master with the sword, he lost his name and bravery to the Sea Hags that plagued the Desconhecido, after he, for unknown reasons and compensation, foolishly stroke a bargain with Veshta, aka 'Yuuko', who went on to use his name as hers. Following this, he was banished from the Unseen Village, and joined the rest of the Nameless as a hunter.
However, his lover Kokoro sacrificed her own name and personality to liberate him, turning cruel, irritable and heartless in the process. With two Hags dead, and 'Yuuko' / Veshta herself escaping justice, he has sworn to track the remaining Hag down and free his lover once and for all. This is, in fact, something he attempted to do during the quest Hag Hunt: Heart's Revenge, when he visited Aburayan Springs in the Millennium Forest. Ultimately, this quest was successful, and the last Sea Hag was slain, finally liberating all the affected Kitsune - including Kokoro.