Because you like Mrs. Whatsit in A Wrinkle in Time
Don't ask Rosa Diaz, a Brooklyn detective, to lighten up. Actually, to be safe, don't ask her to do anything! See them in Brooklyn Nine-Nine.
Emma Woodhouse knows what's best for everyone else. Just don't try to tell her what to do. See them in Emma.
Cutting ties with her con-artist friends, Sarah Manning is creating a better life for her daughter by taking on the identity of the deceased Beth. See them in Orphan Black.
For someone who swears she doesn't care for anyone, MJ Jones spends a lot of time observing her classmate Peter Parker. See them in Marvel Cinematic Universe.
Chaos is what killed the dinosaurs, and there's nothing Jason "J.D." Dean loves more than chaos. See them in Heathers.
Fiona Gallagher wants to be able to give her siblings everything that they deserve because her parents aren't going to do it. See them in Shameless.
A house elf, Dobby is loyal, compassionate, and yearning for freedom. See them in Harry Potter Series.
There is never a dull moment with Jim Moriarty: expect booze and sing alongs in between all of the homicide. See them in Sherlock.
An alien living in a temple shaped like a giant woman, Pearl enjoys ballet, fencing, and using her magical spear. See them in Steven Universe.
A Hollywood starlet with a vindictive streak, Madison Montgomery is one witch that you shouldn't cross. See them in American Horror Story.
If Lisbeth Salander can hurt a bastard who deserves it by digging up stuff about him, she feels good. See them in The Girl with the Dragon Tattoo.