According to Diavolo, before the Devildom became the Devildom, it was ruled by a Fairy King, until they were put to sleep by having them ingest the blood of demon (who was apparently became the first Demon King) via trickery. As an aside, the lore tibit from the OG game about the Devildom starting as a primordial forest, personally is making sense if it was once Fairy Land. Anyway, the Fairy King was deposed and the realm became known as the Devildom. But what happened to all the fairies afterwards? In the OG game, some were encountered in the forests of the Human World, and they were said to be rare in recent times. However, could any of the known characters in the OG game or Nightbringer be fairies? I think yes, namely the Rose Queen. Quick breakdown, the Rose Queen is a character that appears in the two "Dame" events on the OG Obey Me game. What we know is she is a friend of Diavolo, and prior to the first event she featured in had a fear of male demons (then there was plot and character development and she became more comfortable). She is also known for her roses and has some degree of popularity in the Devildom. We are not told much else about her past, or if she is a demon or a sorceress or anything else. And now we are told that the lands of the Devildom were once ruled by fairies. And now entirely new option has become a lot more viable. To be entirely honest, I have had half-formed headcanon for the Rose Queen being linked to faeries long before the latest lesson, and I am quite happy I have been given a bone of sorts. As for the Rose Queen herself, I don't think there will be a third event with her, as long as the OG game is running (due to shared events). But I do wonder if we will encounter her in Nightbringer.