Because you like Minerva McGonagall in Harry Potter Series

Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.

Caleb Rivers is a bad boy with a good reason for acting out. See them in Pretty Little Liars.

K-2SO is a blunt and sarcastic reprogrammed Imperial droid who is always up for an adventure. See them in Rogue One.

Dorothy Gale is a down-home Kansas girl in a bizarre fantasy land with beautiful red shoes. See them in The Wizard of Oz.

A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.

Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.

Kate Beckett is a no-nonsense policewoman with a nerdy side. See them in Castle.

Just because he rules Hades, doesn't mean he can't be fun! See them in Hercules.

A bumbling hobbit, Bilbo Baggins is becoming a part of something much larger than himself as he embarks on a quest. See them in The Hobbit: An Unexpected Journey.

A stylish agent, Agent J would rather improvise than play by the rules. See them in Men in Black.

Davos Seaworth is steadfast, intelligent, and trustworthy, which are hard traits to find in a place like Westeros. See them in Game of Thrones.

Frodo might have carried the ring, but Samwise Gamgee carried the ring bearer. See them in The Lord of the Rings.