You heard a story about hello kitty made to worship evil?

I haven't heard any stories about Hello Kitty being made to worship evil. It's important to remember that Hello Kitty is a fictional character created for children, and the concept of her being used for evil purposes is purely speculative.

If you're interested in exploring themes of good and evil in fictional narratives, there are many stories and characters that do deal with those topics in a more direct and meaningful way.

Perhaps you're thinking of a story that involves a character similar to Hello Kitty, or a story that uses a different kind of iconography to represent evil? If you can share more details about the story you heard, I might be able to help you identify it or understand its themes better.