Because you like William A. Rawls in The Wire

Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.

Xander Harris' life motto: laugh in the face of danger and then hide until it goes away. See them in Buffy the Vampire Slayer.

A Berlin-based locksmith by day, Wolfgang Bogdanow is a world-class thief by night. He can also see out of other people's eyes, but that's a different issue. See them in Sense8.

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

Hunting ghosts is both a job and a passion for Abby Yates. See them in Ghostbusters (2016).

It's impossible to say whether Winifred Burkle is cuter than she is smart, or vice versa. See them in Angel.

Andrew Glouberman is trying to make it through puberty with his sanity intact. See them in Big Mouth.

Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.

In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.

Kilgrave is a domineering, abusive boyfriend. Then, add in the power of mind control. See them in Marvel Cinematic Universe.

Extremely violent and loyal, Sandor Clegane is called the Hound for a reason. See them in Game of Thrones.