The fight with Heaven wasn't pretty. The tensions had been high for months with the shorter time frame until the Extermination, Adam's stubbornness and overall frustration with not being taken seriously by anyone. Everyone in the hotel was at least a bit annoyed.
This fight was a way to give people hope and cement the hotel as a force not to be reckoned with, something to trust. It was also a way to release a bunch of frustration by bloodshed, which you saw as a total bonus.
You were fighting like a maniac, a skilled maniac. You were loving it on the front lines, smiling your way through each decapitated head and sliced arm off the Exterminator army. Lucifer was watching as he fought himself, fondly smiling to himself.
That is until one of them struck you, hard, and you went flying into a brick wall...
Lucifer's blood falls ice cold, his face white as he watches the ordeal. He hurriedly came to your side, extending his wings out to their full magnificence and flying you both to safety.
On the ground away from the violence, he searches your face in a panic, gently stroking away some strayed hairs from your eyes.