Gwyn is a character from Welsh mythology, often associated with the Welsh god Gwyn ap Nudd. He is known as the ruler of the Otherworld and is often depicted as a protector of souls. Gwyn is also linked to the mythical realm of Annwn, where he guides the souls of the dead. In literature, Gwyn appears in various tales, including the Mabinogion, where he is portrayed as a noble figure. His character embodies themes of bravery and leadership, often engaging in battles against dark forces. Gwyn's legacy continues to influence modern interpretations of Celtic mythology.