"Darth Nihilus was one of the most powerful Sith Lords in the history of the galaxy, so corrupted that his very presence meant death." ―Star Wars Miniature Bust: Darth Nihilus (Gentle Giant Studios)

Ezra Bridger became the apprentice of Maul after The Ghost crew left him on Lothal for his own good. Maul introduces Ezra to The Dark side but The Dark side Can't corrupt him completely. Even though Ezra is learning the ways of the Dark Side, a part of him will still be light.