Board Thread:General Discussion/@comment-6192846-20130913170916/@comment-6192846-20140612141700

I don't know, the Demon is made to sound rather desparate, and its been implied to stay quiet since she made her contract. It also sounds rather odd it would make up a whole story about a Golden Key that we know is actually poisonous and has an in-depth explanation of why it is so.

If this was a Ney-esque exposition (ie, "I saw Leonhart and Mariam talking and Leonhart said [ Statement A]"), I'd believe it, but this scene really takes the time to explain everything to the reader (without going too deep into the mechanics).

I am not convinced that's what happened to the Demon of Lust, but I think Octo's at least got a good theory for us to go off of.