When she died...

Perhaps some concept, some idea disappeared as well.

Aki (Autumn)

And perhaps this character describes that concept.

That would explain why no one can read it.

Your power stops us from recognizing this concept, and so the character seems completely meaningless.

If the victim held some kind of influence over an idea like that, it would vanish with her when she died.

And since we knew she had to have existed for thousands of years before now, it would make sense for her to be a god.

I see.

Books

Signs

We actually got some useful leads thanks to that article.

People felt like lots of things were missing.

In particular, books, poetry collections...

And signs for an annual festival.

The thing that ties all of those together is writing.