So, I had mentioned this a few days ago, I feel like writing a RadioApple book as well, for this one I have a few ideas, but still need to bring them together a little more, and I'm still not sure if you guys would even enjoy this, lol
So, I'm thinking Abused and Depressed Lucifer for this, he's lonely and being at the hotel makes him feel somehow further away from Charlie, he tries to engage as much as he can in activities but gets mentally tiered quickly. Adam is reborn as a demon, forcing Lucifer to have to deal with him and Heaven.
One night, as he drowns himself in alcohol and his thoughts of his wife, both good and bad, though there's much more bad memories than good ones, Alastor approaches him, mocking him slightly after Lucifer had accidently made Charlie cry.
At first all they do is fight, which starts getting on everyone's nerves, Charlie deciding to put an end to this by taking the two prideful demons to a play, only to ditch them halfway through it.
Lucifer and Alastor slowly spend more and more time together, secrets from the past spilling, and just as they start to somewhat get along, Lute lies about who broke the contract and who killed Adam, trying to have the King of Hell killed by Sera's hands, which forces Lucifer to be reunited with his brother, Gabriel.
Lucifer coming back to hell covered in blood, a broken wing, and heavenly spears protruding from his body. Luckily Alastor is the one who finds him, taking The King to his room to help clean him up, hiding him away from Charlie for now.
A friendship slowly being formed as they realized they have much more in common than they think, Alastor helping Lucifer feel like he matters again, and Lucifer helping Alastor to trust someone and open up about his past.
I feel like having a semi-chaotic good Charlie, only when she needs to, Lilith plotting to kill Lucifer, destroy the hotel, and take over hell with Charlie to try and make heaven pay, definitely gonna have some Valentino bashing for sure