Because you like Brian O'Conner in The Fast and the Furious

Introspective Theodore Twombly would rather observe life than participate in it. See them in Her.

An inter-dimensional demon, Bill Cipher dreams of a more chaotic Gravity Falls. See them in Gravity Falls.

Jughead Jones loves burgers, his friends, and philosophizing with his unique brand of wisdom. See them in Archie Comics.

Armin Arlert was wrong. This world hasn't become hell; it's been hell. He just couldn't see it before. See them in Attack on Titan.

Yukiteru is a reclusive observer who would rather watch life go by than participate in it. See them in The Future Diary.

Irene Adler has to use both her brains and her body to survive. Luckily, she's usually the most brilliant person in the room. See them in Sherlock.

Twisted and seemingly soulless, Bellatrix Lestrange finds joy in making others suffer. See them in Harry Potter Series.

Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.

Spyro the Dragon loves getting into trouble around the Dragon Realms. See them in Spyro the Dragon.

Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.

Adrian Agreste is a charming rich teenage boy, model, and hero in a catsuit. See them in Miraculous: Tales of Ladybug & Cat Noir.

Don't tell anyone Kate Austen was under arrest when the plane crashed. See them in Lost.