Because you like Marlena Rosenbluth in Water for Elephants
Edmund Pevensie isn't a bad person, but he did sell his siblings out for a tin of Turkish Delight. See them in The Chronicles of Narnia.
Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.
Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.
Causing mayhem practically since birth, rambunctious Fred Weasley plays pranks on his siblings and avoids school at all costs. See them in Harry Potter Series.
Paris Geller is a newspaper editor, class president, and headed for Harvard. See them in Gilmore Girls.
Tom Hansen is a full-fledged romantic impatiently waiting for his love story. See them in (500) Days of Summer.
Villanelle is a hired assassin who loves committing murder as much as she loves dressing up in fancy pink ballgowns. See them in Killing Eve.
Prideful and psychotic tendencies combine to make Dr. Eggman a dangerous and villain who will squash anyone in his path. See them in Sonic the Hedgehog.