Pwyll is a character from Welsh mythology, primarily featured in the collection known as the Mabinogion. He is the prince of Dyfed, a region in Wales, and is known for his wisdom and strong sense of justice. Pwyll's story often involves his interactions with the supernatural, particularly with the Otherworld and its inhabitants. One of the most notable tales involving Pwyll is his encounter with Arawn, the king of the Otherworld. Pwyll agrees to swap places with Arawn for a year, allowing him to defeat a mutual enemy. This exchange leads to adventures that highlight themes of friendship, loyalty, and the complexities of fate.