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In a pragmatic attempt to spur Hell's infuriatingly ineffective king into doing something useful for a change, Alastor finds Lucifer becoming far more attached to him than he had intended and scrambles to deal with the consequences.
Lucifer is just trying to figure his shit out and not completely fuck things up with Charlie.
“I know Alastor’s been gone for a long time, but murder, Luci? You love him.” Ozzie’s voice was soft and it made Lucifer clench his teeth, baring his fangs at the room at large.
“That is NOT Alastor.” Lucifer would know his partner anywhere, and that hack sure as shit wasn’t him. But he was pretty flawless if even Ozzie thought he was.
“Luci…baby…” Ozzie’s voice took on the annoying, I’m-worried-about-you tone and Lucifer had to fight to not start breathing fire.
“Alastor is dead."
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Lucifer's partner has been missing (presumed dead) for seven years. He's coming around to accepting that. And then he's visiting Charlie's Hotel and there's a demon pretending to be his Alastor? He thinks the fuck not!