The lord of Sardin in the country of Angiez. He was married to a goddess named Giramphiel, who had Lady Fortune supply him with a special belt. This belt, garnished with enchanted stones, made its wearer not only strong and brave, but also handsome and charming. During a visit to Arthur’s court, Fimbeus lent the belt to Queen Guinevere, who coveted it so much that she ordered Gawain to fight Fimbeus for it. Gawain reluctantly complied, and won.

Giramphiel later managed to steal from Gawain the stone that was the source of the belt’s power. She returned it to Fimbeus. Gawain embarked on a quest to recover the victory stone for Arthur’s court, the culmination of which brought him to Sardin, where he again defeated Fimbeus, recaptured the stone, and obtained Fimbeus’s fealty.