Manawydan is a character from Welsh mythology, known primarily from the Mabinogion, a collection of medieval Welsh tales. He is often depicted as a son of Llyr and a brother to Bran the Blessed. Manawydan is associated with themes of magic, transformation, and the natural world. In the stories, Manawydan embarks on various adventures, including a quest to rescue his wife, Rhiannon, and to reclaim his homeland. His character embodies the connection between the human and supernatural realms, showcasing the rich tapestry of Celtic mythology and its emphasis on the interplay between fate and free will.