Because you like Susie Greene in Curb Your Enthusiasm

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

Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.

Hiccup Haddock III may be the only Viking nerd in recorded history. See them in How to Train Your Dragon.

He tells you everything you need to know: "I. Am. Groot." See them in Marvel Cinematic Universe.

Albus Dumbledore oversees the most unsafe school in recorded history, with Dementors and giant arachnids run amok. See them in Harry Potter Series.

Ariel knows there's a whole other world above the sea, but exploring it comes at a big price. See them in The Little Mermaid.

Regina Mills is a cold evil queen turned chilly town mayor. See them in Once Upon a Time.

His elfin self-confidence can border on pretension, but Legolas Greenleaf is a fearsome fighter and a loyal friend. See them in The Lord of the Rings.

Thor is Asgardian nobility who is tickled by how us earthlings live. See them in Marvel Cinematic Universe.

A baker turned reluctant fighter, Peeta Mellark can charm his way out of just about any situation. See them in The Hunger Games .

Socialite-turned-runaway-turned-waitress, Rachel Green is the legendary story of riches to rags, trying to work her way up again with the help of her friends. See them in Friends.