Because you like The Terminator in The Terminator
If it were up to her, Merida would spend her days practicing archery and swordfighting, riding her horse, and exploring the Highlands. See them in Brave.
Jughead Jones loves burgers, his friends, and philosophizing with his unique brand of wisdom. See them in Archie Comics.
Leonard "Bones" McCoy is passionate, moral, and ready to stitch you back together. See them in Star Trek.
It's hard to tell if Dean Winchester cares more about saving the world or his 1967 Chevy Impala. See them in Supernatural.
Howl puts the "tortured" in tortured artist. He just wants to be recognized for his work, but no one wants to trust a boy that sorta looks like a bird. See them in Howl's Moving Castle.
Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.
Though bold and pure of heart, Utena Tenjou has a fairytale vision of the world that can make her oblivious to its darkness. See them in Revolutionary Girl Utena.
A fearless superhero, Carol Danvers always aims to go higher, further, faster. See them in Marvel Cinematic Universe.
Cosima Niehaus loves exploring the unknown. Even her own DNA is a puzzle, waiting to be unlocked. See them in Orphan Black.
Amy Farrah Fowler deserves sainthood for putting up with Sheldon Cooper. See them in The Big Bang Theory.