Basically the above. Edith was kind of weird and twisted, but the writers and artists didn't make it too overt by having her dress like a Goth/punk or anything. She was still cute, girlish and appealing, despite being a bloodthirsty oddball. Plus, I liked her design, especially the hat; reminded me of Michael Nesmith, my favorite Monkee.
Don't worry for not remembering. I work at a movie theater which means I get free movies which also means I have seen this movie 900 bajillion times. And once you do that you pick up on tiny details that other people don't notice the first time.
If I was a betting man I would bet you everything I have right now that in the sequel they won't give her a small role, they won't mention her at all. She would just be forgotten and never heard about again. But , yeah if you see it again chances are you will know what I am talking about.