Orn

Orn was the bodyguard of Alator of the Catha. He was likely another, less powerful Priest of the Catha, although he was only seen fighting with a sword.

Biography
He accompanied Alator when he kidnapped Gaius for Morgana and later attacked Gwaine while he and Merlin were searching for Gaius. Gwaine was at Orn's mercy but Merlin used magic to save him by making Orn fall on Gwaine's sword, presumably killing him (The Secret Sharer).