Because you like Abbi Abrams in Broad City
His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.
Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.
Megamind is searching for purpose in a supervillain life without a superhero to fight. See them in Megamind.
Love Quinn is a trained chef and excellent girlfriend, but she's hiding something dark. And bloody. See them in You.
With most of the people that Sango loved now gone, the only thing she wants is to kill the demon who destroyed her village. See them in Inuyasha.
Rick Sanchez is a gruff, alcoholic mad scientist, with the emphasis on "mad." See them in Rick and Morty.
A super-soldier, Master Chief might be more machine than man. And for humanity's sake, thank God. See them in Halo.
George Weasley likes to invent quirky joke products, play Quidditch, and cause poor Mrs. Weasley a lot of anxiety. See them in Harry Potter Series.
A monstrous pirate captain, Davy Jones is quite literally heartless. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
For Morgana, sometimes wanting to do the right thing can led you down the wrong path. See them in Merlin.