Because you like Willow Rosenberg in Buffy the Vampire Slayer

An alien living in a temple shaped like a giant woman, Pearl enjoys ballet, fencing, and using her magical spear. See them in Steven Universe.

Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.

A genetic experiment engineered to be the perfect assassin, Agent 47 is cold, professional, and lethal. See them in Hitman.

Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.

Madman, murderer, or musician? No one knows the Phantom behind the mask. See them in The Phantom of the Opera.

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.

This bite-sized, power-hungry plankton is determined to uncover the secret recipe for the Krusty Krab burger. See them in SpongeBob SquarePants.

Talos is a mysterious military commander skilled in the art of deception. See them in Marvel Cinematic Universe.

The "runt" of his biker gang, Tetsuo Shima grapples with a perpetual inferiority complex. See them in Akira.

Murph is inquisitive, compassionate, and stubborn, with a passion for science she shares with her dad. See them in Interstellar.

Beware! Anton Chigurh carries a coin with him, which he forces his victims to flip to decide whether they will live or die. See them in No Country for Old Men.

A jealous woman is dangerous. A jealous assassin woman like Elle Driver is even more so. See them in Kill Bill vol. 1.