Stories vary in how they depict his character: some picture him as Arthur's honorable and faithful steward, others describe him as mean spirited or even traitorous. It is not known for certain how he died, but some accounts involve the battle against Mordred and some blame Gwyddawg.
One of the earliest knights in the stories of King Arthur, he is linked to the real-life Lord of Caer Goch.
External links
King Arthur & The Knights of the Round Table: Sir Kay (http://www.kingarthursknights.com/knights/kay.asp)
In Arthurian legend, SirKay (Welsh:Cai or Cei, Latin: Caius or Gaius) is Sir Ector's son and King Arthur's foster brother and later seneschal, as well as one of the first Knight of the Round Table.
Kay shows his characteristic opportunism when he tries to claim it was he that pulled the sword from the stone, making him the true king of the Britons, but he relents and admits it was Arthur.
Kay and Bedivere appear in Geoffrey of Monmouth's Historia Regum Britanniae, and aid Arthur in defeating the Giant of Mont Saint Michel.