Because you like Rose Tyler in Doctor Who

Juno MacGuff is hoping sarcasm will get her through the stress of teenage life. And also, teenage pregnancy. See them in Juno.

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

A great galactic bounty hunter, Samus Aran is not as good at expressing emotions. See them in Metroid.

Shrek is a nasty-on-the-surface ogre with a heart of gold and an earful of wax. See them in Shrek.

Impassive, overly literal, and a little short on people skills, Angel dedicates her life to enforcing the rules. See them in Angel Beats!.

With most of the people that Sango loved now gone, the only thing she wants is to kill the demon who destroyed her village. See them in Inuyasha.

As a scaring Assistant, Mike Wazowski frightens children to collect their screams to be used as a power supply for the city. See them in Monsters, Inc..

A hardboiled 1940s detective, Cole Phelps is haunted by his past in World War II. See them in L.A. Noire.

Killua Zoldyck is so tired of killing. He just wants to be a kid, hanging out and doing stuff with his friends. See them in Hunter x Hunter.

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

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