Because you like Debra Morgan in Dexter

An escaped convict on a mission, Sirius Black is brooding, brave, and reckless. See them in Harry Potter Series.

A bookish know-it-all with a bossy streak, Hermione Granger always stands up for what she believes in. See them in Harry Potter Series.

A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.

Cher Horowitz may have a problem with hubris, but she looks utterly fabulous while learning a lesson about the dangers of meddling. See them in Clueless.

A sweet princess , Giselle is about to realize that life is no fairy tale. See them in Enchanted.

When Jessica Jones is not throwing back drinks, she's taking down bad guys with her strength, detective skills, and foul-mouthed insults. See them in Marvel Cinematic Universe.

Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.

L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.

This high school queen bee has everything, including a genius-level IQ—a fact Lydia Martin keeps hidden to maintain her image. See them in Teen Wolf.

Whatever Sakura Haruno lacks in power, she makes up for in intelligence and bravery. See them in Naruto.

Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.