What happens in the video is not canon in my story, it's just an alternate Au to mine (that Au came out thanks to a Cuphead group, A roleplay group)
It's kind of strange, because the roleplay was that Lucifer fell into the backrooms and her friends went to look for her, but they realized that it wasn't Lucifer, but someone who dressed up as her, since that person wanted the book that King Dice has (In the end, he transformed into King Dice and took advantage of the moment where he left the book neglected and stole it)
Well, Dex and the purple-eyed character belongs to @denara-pato (she made a "story" on Wattpad about the roleplay, but it's in Spanish)