Because you like Summer Finn in (500) Days of Summer

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.

With those dearest to him dead and no one to trust, Max Rockatansky is a slightly hysterical man alone on the run in a post-apocalyptic world. See them in Mad Max: Fury Road.

The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.

Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.

Even the smallest person can change the course of the world, if he's brave enough. See them in The Lord of the Rings.

A rebellious blue-haired art student, Karou has mysterious connections to a magical world. See them in Daughter of Smoke and Bone .

Molly Weasley runs a household teeming with magic: gnomes run around the garden, dishes wash themselves, and noisy ghouls rule the attic. See them in Harry Potter Series.

Oscar Martinez is a national accountant in an office of weirdos. See them in The Office.

Willow Rosenberg may be a witch who can defeat the forces of evil, but she still gets emotional over kittens on the Internet. See them in Buffy the Vampire Slayer.

Don't worry about this forensic scientist offing you unless you're a serial killer yourself. (You're not, right? Just checking.) See them in Dexter.

Remy Hadley is a closed book—a cynical, super-smart closed book. See them in House M.D..

The self-described "ghost with the most" knows the ins-and-outs of specter life like no other. Just ask him. See them in Beetlejuice.