Sir. Kay(Jak)

Sir. Kay was a member of the Knights of the Round Table who served under King Arthur, and was with Arthur the longest, as the two of them grew up together as step siblings; he's also one of only two members of the Knights of the Round Table who knew her true identity as a woman, along with Sir. Lancelot. Sir. Kay was one of the six members of the Knights of the Round Table who remained loyal to Arthur through Merlin's rebellion, along with Lancelot, Gawain, Bedivere, Percival, and Galahad. Despite being the only one of the six to truly question his King's lack of emotions, he remained with Arthur till the end, and ended up dying in the line of duty during Merlin's rebellion.