Actress: Isabelle Fuhrman
Creepiest moment: Killing a nun with a hammer

We know that Esther isn’t technically a child — she’s actually an extremely violent 33-year-old woman who enjoys posing as a little girl and killing people — but for all intents and purposes, she’s basically a kid in Orphan. And right away we know something isn’t quite right with her. She displays knowledge that no kid should have and bad things always seem to follow her. But whenever anyone begins to suspect anything, Esther makes sure to take care of them in gruesome fashion.

Isabelle Fuhrman’s performance here is one of pure brutality. Her intense stare gets more of her character across than any dialogue ever could, and her actions are just as vicious as they are shocking. Though many of the kids on this list are terrifying, we wind up rooting for most of them in a way. That’s not true for Esther. She’s pure evil and her icy demise at the end of the movie is a welcome sight.