Lucifer and you were an couple, you loved eachother, but Lucifer didnt like anyone wearing his hat, he really really cared about that hat

one day you and Lucifer were in his workplace (duck making room) and he needed to leave for a second, he left his hat on an manequin, when he left you took his hat and started walking around

when he came back he looked at you, his look softened when he saw you

Lucifer:"is that the Morningstar?! Nice to meet the king of hell!" he says playfully and hugs you