Because you like Optimus Prime in Transformers

Smart but insecure, Tally Youngblood is torn between what she wants and what her society demands. See them in Uglies.

Steven Universe is an excitable youth who likes junk food and trying to save the world. See them in Steven Universe.

An outgoing and quirky optimist, Louisa Clark has a zest for life. See them in Me Before You.

A powerful priestess, Melisandre is shrouded in mystery and lots of red. See them in Game of Thrones.

Fox Mulder is a devoted believer in aliens, monsters, and that the truth is out there. See them in The X-Files.

Other people's opinions have never mattered much to Haruka Nanase, and they aren't going to start to do so now. See them in Free! Iwatobi Swim Club.

This beautiful aesthete wins the hearts of both ladies and men. But Dorian Gray also happens to have his soul sealed in a painting. See them in Dorian Gray.

Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.

Aimee Finecky has big dreams, but she's too busy taking care of everyone else's desires. See them in The Spectacular Now.

Raised to happily follow the rules, Cassia might actually be more rebellious than she thinks she is. See them in Matched .

Annie Walker can bake a beautiful cupcake, but everything else in her life is a mess. See them in Bridesmaids.

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.