Silimac of the Rock

Ruler of the Castle of the Rock.

While traveling to the Grail Castle with Gawain, he was killed with a poisoned arrow that seemed to come out of nowhere.

Gawain later assisted Sore Pucelle, Silimac’s sister, and she divined that Kay was the unseen murderer. Gawain swore to avenge Silimac’s death, and he badly wounded Kay in a duel at Arthur’s court.