Because you like Buttercup in The Princess Bride
Chris Chambers is from a family of social outcasts and criminals, and he wants more than anything to avoid ending up like them. See them in Stand By Me.
Galina Reznikov is the head chef of prison, cooking up meals as well as storms on anyone who dares to cross her; even the guards are terrified of her. See them in Orange Is The New Black.
How is angel Aziraphale supposed to stop the apocalypse when Hell's forces misplaced the Antichrist somewhere? See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.
There isn't a man in the world who executes his job with more finesse than Monsieur Gustave H. See them in The Grand Budapest Hotel.
Stella Grant is an organized, orderly optimist living with a dangerous disease. See them in Five Feet Apart.
Ex-adviser to the king and most powerful sorceress, Yennefer is determined to be even stronger to attain her freedom in a war-torn world. See them in The Witcher.
A jealous woman is dangerous. A jealous assassin woman like Elle Driver is even more so. See them in Kill Bill vol. 1.
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.
A short-tempered guy, Bowser is determined to wreak havoc on the Mushroom Kingdom. See them in Super Mario Bros..
With a unique ability to empathize with killers, Will Graham helps society but his sanity pays the price. See them in Hannibal.
Helena is a mentally unstable, childish, and completely merciless. And most of all, she's an unstoppable killer. See them in Orphan Black.
An obsessive schoolgirl, Yuno has two sides to her personality, and both are equally unnerving. See them in The Future Diary.