Agravain
Agravain was another one of Morgause's sons, and he got a good dousing of evil from her. He disliked Arthur with the same passion his mother did, and so together, they tried to destroy him. His half brother Mordred also helped Morgause overthrow the King.
He was Arthur's nephew, and he managed to ruin his uncle. He also ruined Arthur's two closest friends. By exposing Lancelot and Guinevere's love for each other, he forced Arthur to have to punish both of the people he loved most. However, Lancelot returned the damage by murdering him.
Agravain was a valuable asset to Morgause's team, and did a lot of damage to Arthur. This makes him a key element in the tales of King Arthur.
He was Arthur's nephew, and he managed to ruin his uncle. He also ruined Arthur's two closest friends. By exposing Lancelot and Guinevere's love for each other, he forced Arthur to have to punish both of the people he loved most. However, Lancelot returned the damage by murdering him.
Agravain was a valuable asset to Morgause's team, and did a lot of damage to Arthur. This makes him a key element in the tales of King Arthur.