Your au is amazing, like WOW, Cain just loving his father so much he's willing fight for the crown of Hell to give it to him, just yes!
Also, since Cain resuscitated Adam, does that mean he hasn't fallen? because, honestly, a holy angel on the throne of Hell would be such a look
I would like to also throw in my two cent that guitarhero would probaly be a safe bet since with amdasapple you kind of have to navigate the how Lucifer cuck him twice and then taunt him about it, the whole forbidden fruit thing, also Cain has reasons to hate him and Adam would care a lot about that
Cain is 100% willing to throw hands over his father! He fiercely guards close relationships and Adam is the most important one. That boy came out of hiding after 10,000 years of lying low. All to save his father. The Morningstar’s crown is the best protection he can give to his dad.
But yes, Adam is still a holy angel and Lucifer is malding in a corner! I imagine Adam sitting on a thrown made of swords (spears?) like in Game of Thrones. He’s still sickly but can lift his head and gives off a heavenly glow. Cain is in the background watching to make sure people stay in their lane. Pray for the impudent fools who try to attack haha.
As for the pairing for Adam. Yeah, Adamsapple is harder to work with than Guitarhero in this AU. Adam’s health is the reason why Lucifer is an option at all. It involves how angels can stand being in hell. If you know Made in Abyss you can kind of get an idea. I don’t want to say alot because I’m still not completely sure.
(I have an idea on how Lucifer can make up for what he’s done to Adam in a more cannon setting but I think that has to be in another AU. Or I can give it to the world to play with.)
Guitarhero works because I imagine Michael has interacted with Adam as the Angel of Protection (War?). In this AU Adam would have taken Michael’s place as the head Executioner due to a contract. This contract is extremely important and is the reason why humans even get to go to Hell or Heaven. Michael would be the only angel who understands Adam’s emotional pain in Heaven and does his best to fix the problem. He gains Adam’s respect for that.












