Because you like Egon Spengler in Ghostbusters

Michaelangelo is an above-ground crime-fighter by night, and a pizza-eating, sewer-dwelling mutant ninja turtle by day. See them in Teenage Mutant Ninja Turtles.

Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.

Mac is a karate-chopping, beer-chugging schemer. See them in It's Always Sunny in Philadelphia .

Kristoff may seem standoffish, but this ice harvester has a warm heart. See them in Frozen.

Bumbling, jolly, and loyal, Rubeus Hagrid has the uncanny ability to make the best of a bad situation. See them in Harry Potter Series.

Viking Astrid Hofferson has it all: brains, brawn, and some killer braids. See them in How to Train Your Dragon.

Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.

The ever-cheerful Tonks can change her appearance at will, but she can't seem to get rid of her clumsiness. See them in Harry Potter Series.

Warm and caring, Kitty Forman acts like a mom towards all of her kids' friends. See them in That '70s Show.

Claire Temple is a dedicated nurse providing secret care to New York's vigilantes. See them in Marvel Cinematic Universe.

After Otto Octavius' accident, he becomes fixated on finishing the reactor at any cost. See them in Marvel Cinematic Universe.

Beneath Lena Duchannes' prickly exterior lurks a sensitive, compassionate soul. See them in Beautiful Creatures.