Lancelot is the son of the Ban, the Fox sin of Greed, and the Queen of the fairies Elaine. He is a Holy Knight of Liones, and one of the Four Knights of the Apocalypse, representing War. Lancelot greatly admires the Seven Deadly Sins and wants his father's recognition. He has incredibly powerful magic, his favorite of which being the ability to shapeshift. The drawback to such strong magic is that it causes any weapon he imbues with it to break after one use, leading to his weapon of choice being a bow and arrow due to their disposable nature.
Lancelot got his forehead scar from a fight with Tristan while visiting Liones.
Lancelot first appears as a pink fox named Sin. He also has a "Fairy form" that resembles the fatter version of his uncle, King.