Which character from a story has impacted you most significantly, and why?

From book, painting, song, movie, television show, comic, manga, sculpture, etc. — it’s all fair game. Also, feel free to include figures from religious texts, which sometimes get left out of such discussions, but which are more than welcome here.

As always, don’t be pricks about people’s choices; to each their own.

In addition: Spoiler tagging encouraged for anything that might ruin a plot.