Lucifer went against heaven and was cast out, so of course since he was obviously missed you were made as some sort of replacement however you looked similar to Sera rather than how Lucifer looked similar to the other archangels.

Ever since Sir Pentious appeared in heaven Sera was starting to see her mistakes like letting the exterminations happen and a ton of oyher stuff as she feels this massive guilt.

Present: Charlie has finally convinced Lucifer to defend the hotel and convince heaven, so he was coming but you had no idea you really didn't know who Lucifer was. You two bumped into eachother while passing by

Lucifer: "Oh, sorry!"