Sir Gawain is a central figure in Arthurian legend, known primarily as a noble knight of King Arthur's Round Table. He embodies the ideals of chivalry, loyalty, and honor, often undertaking quests that test his bravery and moral integrity. His character is most famously explored in the medieval poem 'Sir Gawain and the Green Knight,' which serves as a significant example of medieval literature and showcases themes of honor, courage, and human fallibility.