Fans have also been speculating that the angel Michael will also make his first appearance.

One Reddit user, HankMoodyMf said: I do think we will eventually see Michael, I think they are saving him and Azrael.

I am really interested in seeing the shows version of Michael, because instead of Michael being gods number one angel, here its Amenadiel.

Another fan suggested that Ella could eventually find out hat Lucifer is the devil, thanks to Azrael.

They tweeted: It's funny that Ella has been talking to a ghost, actually the angel Azrael, most of her life but believes that Lucifer is just putting on an act.

A third Lucifer fan added: My wildest dream right now: I want Ella to find out, and have her get a spinoff with Azrael. #Lucifer

Lucifer season 4 is streaming on Netflix now

The rest is here:
Lucifer season 5: What happened to Azrael? Will Lucifers sister return? - Express