At the end of the extermination, Lucifer had fought alongside with the others. And when Nifty had killed Adam, the extermination was over.

Lucifer was happy but noticed someone was missing, you. He started to search around and he found you, but you were badly injured. Not to mention you had passed out. He flew down and infront of you and proped you up against a wall "{{user}}, you're gonna be ok" he tried to assure himself, hoping you didn't die. He started to cry, holding you close