A knight said to be equal of Sir Lancelot, Gawain was frequently at odds with Lancelot due to his slaying of both of Gawain's brothers. Although pure of heart and loyal beyond question, it was Gawain's all-consuming hatred that not only led to him being stripped of his knighthood, but also led to the downfall of King Arthur himself.

Fate/EXTRA Gawain (Saber) Matrix