To open up different possibilities, I have lifted the stipulation that a character in the story must have a memory erased. I have changed this to the following:
While the backdrop of the story must relate somehow to the Memory Eater, a character does not necessarily have to have a memory erased. A character may think they had a memory erased, when in fact they didn't. Or perhaps you can take this idea in a different direction.
I have applied this change to the blog.