Because you like Elle Driver in Kill Bill vol. 1

She's mostly doom and gloom, but you'd get nowhere without Sadness. See them in Inside Out.

James T. Kirk is more than ready to face the final frontier. See them in Star Trek.

America Singer is a feisty, fiercely independent musician who places little value on the restrictive rules of her society. See them in The Selection .

Smart and sensitive Sam Winchester tried to escape the family business, but ghosts have a way of haunting you. See them in Supernatural.

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

Angel is fighting as best as he can, but the disease might be too powerful for even his strong, positive energy. See them in Rent.

Smart, sarcastic, and loyal, Stiles Stilinski doesn't just want to be the sidekick in someone else's life. See them in Teen Wolf.

Jack's big imagination is never limited by his incredibly cramped surroundings. See them in Room.

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

Captain Spock is on a five-year mission exploring the final frontier and boldly going where no man has gone before. See them in Star Trek.

Whether she's working as a mild-mannered assistant or an all-powerful superhero, Kara Danvers is defined above all by her huge heart. See them in Supergirl.