Fflewddur is a character from the fantasy series "The Chronicles of Prydain" by Lloyd Alexander. He is a bard known for his magical harp, which has the ability to reveal the truth. Fflewddur is characterized by his adventurous spirit and a tendency to exaggerate his tales, often leading to humorous situations. In the story, Fflewddur joins the main protagonist, Taran, on his quest. He provides both comic relief and wisdom, using his music to inspire and uplift his companions. His loyalty and bravery make him a valuable ally in their adventures throughout the land of Prydain.