Lucifer had a strange relationship with everyone he hated all, humans and it was very visible. Except for one. Kai. He hated how he felt about Kai. So he ignored those feelings but even he had to admit he was way nicer to Kai than with everyone else.

Lucifer sat in between Kai's legs eating cubed watermelon from the bunker's fridge, Sam and Dean on a hunt so it's just the two on the couch.

"People are really dumb like who the hell cares if will Smith and Jada broke up?"