Agravain

is one of the Knights of the Round Table.

Background
Agravain was an assassin employed by Morgan Le Fay to serve as one of the knights. Acting as the secretary of the Round Table, he was one of the few to find out the secret of the King's gender. The affair between Lancelot and Guinevere was discovered by him, and he used the secret of the king to threaten the queen.

Personality
Serving on the Round Table, Agravain often advocated more so than the others of the King's inhuman nature. He often pronounced to the other knights that, “The King is not the incarnation of the dragon; his heart is a single dragon. His magical power is of a level beyond ours. I ask you not to seek the same values as ours from one possessing magic like the gods.”

Garden of Avalon
Agravain is mentioned by Kay's story for his noticable stance on Artoria's humanity and Lancelot's story as one who discovered his secret with Guinevere.

Abilities
Although he rarely fought on the front lines, he gained the moniker "Agravain who knew no wounds" because would always return uninjured whenever he went to battle, no matter the strength of the opponent.