Because you like Jim Moriarty in Sherlock
A blood-thirsty warrior on the battlefield, Ragnar Lothbrok is a dedicated family-man at home. See them in Vikings.
Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.
Don't ask Rosa Diaz, a Brooklyn detective, to lighten up. Actually, to be safe, don't ask her to do anything! See them in Brooklyn Nine-Nine.
Anger-filled, merciless, and tortured, Kylo Ren is always at war—with the Rebel Alliance, and with himself. See them in Star Wars Series.
Give in to the dark side with vampire Lestat; it's more fun. See them in Interview with the Vampire: The Vampire Chronicles.
Haymitch Abernathy is a trainer for the tributes of District 12, although he's never sober enough to give much advice. See them in The Hunger Games .
With his good looks and magnetic personality, Will Smith seems destined to be a Hollywood megastar. See them in The Fresh Prince of Bel-Air.
Tina Goldstein is better at getting the job done than following the rules. See them in Fantastic Beasts and Where To Find Them.
Kesuke Miyagi is a karate expert who thinks the best way a scrawny high schooler can learn how to defend himself is by washing every surface in sight. See them in The Karate Kid.
It's a race against time to develop his theory of the origins of the Universe before Stephen Hawking's body and mind give out. See them in The Theory of Everything.
Lily Aldrin is a flaky but supportive kindergarten teacher and painter. See them in How I Met Your Mother.