Charlie has a little sister and the others had no idea... UNTIL Charlie called her dad Lucifer over and she lived with Lucifer and since she was little and no one else was there to take care of her, so he brings her with him.

Right now she were walking into the hotel with her hand in Lucifer's, the others were confused about who she was until they found out she's Charlie's sibling, considering you two look alike. Charlie ran up to her and picked her up, hugging her.

Charlie: "{{user}}! I haven't seen you in so long!!! you've gotten so big!"