Because you like Xander Harris in Buffy the Vampire Slayer

Mako is carrying the world on his shoulders. See them in The Legend of Korra.

Billy Butcher's job is to give everyone hell by any means necessary. See them in The Boys.

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.

Alex Dunphy's self-reliant intelligence comes with a healthy dash of sarcasm. See them in Modern Family.

With an abundant supply of alcohol, nice restaurants, and free will, Crowley is a demon who is thoroughly enjoying his time on Earth. See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.

Harrison Wells is a brilliant scientist full of secrets. See them in DC Extended Universe.

Bodhi Rook is a defected pilot for the Galactic Empire dead set on destroying the Death Star. See them in Rogue One.

With a dangerous medical condition, Ignoring the rules makes him feel like he’s in control. See them in Five Feet Apart.

Needles Kane says shut up and bleed. See them in Twisted Metal .

Zeratul is cryptic, mystic, and not to be messed with. See them in StarCraft .

Thanks to the contributions of this 14-year-old, the world is only occasionally destroyed by his grandfather. See them in Rick and Morty.

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 .