Sir Galahad - Teon
Among all the knights, Sir Galahad was the holiest one, who is the only one can get the Holy Grail. After got the Holy Grail, he fell in love with King Arthur’s wife named Guinevere who was snubbed by King Arthur. The affair incurred the wrath of King Arthur who ordered to hunt Sir Galahad down.
After died, Sir Galahad became a horrible monster who drifted Maros Dungeon. The knights who followed Sir Galahad with awe died in the dungeon in the fights with King Arthur’s army. They became the undead soldiers that guarded the death knight, Sir Galahad.