Rowena would be awesome as long as she keeps her meat suit and is the same actress. I absolutely loved her and was very upset how they killed her off. However for whatever reason the first person that came to my mind was Metatron. I have no idea why but his name was the first to pop up for me.
Demon Adam would be awesome because he really got the shaft in this series haha
Is there any of Lucifer's what were they? Siblings or children or something that were all passing on running hell in order to be left alone. I know they killed off 2 of them but wasn't there a 3rd that was never shown? That one would make logical sense