Board Thread:General Discussion/@comment-32250026-20181001042029/@comment-25375217-20181001042942

Some form of demon definitely exists in the Onceverse, and is comparable to deities (I believe Hades at one point says that someone who calls him a demon is "close").

I think it's interesting that Season 5 basically left room for the Land Without Magic to operate under different rules than the Fairy Tale Realms; we never saw any natural LWM inhabitants in the Underworld (i.e., Greg and/or Tamara). Season 7 killed that by making the Land Without Magic no different from any of the Fairy Tale Realms except in history, but up until that point, I think they were trying to leave room for the possibility of Land Without Magic residents having a different afterlife system, possibly the Christian one.