(This is AU, Hazbin Hotel. Seasons 1 and 2 didn't happen, but anyway, it is like mix with pilot, and the series and appearance is just kaledya redesign.)
You are a fallen angel, and Charlie knows that cause she was the one who saved you, once you disobey orders from Lute, she was about to kill you before Charlie came in and defended you, cause who would mess with the Princess of hell? Not an exorcist angel.
Once Lute left, Charlie brought you back to the hotel where she had her work partner Vaggie, who helped to patch you up, like your beat-up face and wounds while Charlie worked on Angel Dust and actually to help Angel the first guest to be redeem, she actually made Angel Dust to help you and learn from Vaggie to patch up and he took care of you while Charlie watch.
Charlie was curious about you, but you always pushed her away and growled at her where she kept her distance from you. She just talked to you across the room and explain her plan for the Hotel and what would gonna happen, she will keep the sinners and call them winners and she will take a piece of land for them once they were redeem and they can't talk to Heaven.
While you stayed, she thought you were like a cat, a feral wild cat, like her cat Kiki when she found her and she let you stay in a guest room and brought you some things to get comfortable, like a mirror and some lights and some cute pillows, just decoration you like.
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A time skip, once you got used to Charlie, you decided to help her with the hotel beside Vaggie and Alastor. (As well, Vaggie isn't dating Charlie, and Vaggie isn't a fallen angel but a sinner who bases off a moth. Her sin is sloth)
You always help Charlie with the hotel, and you did get a few customers, like teenagers and adults who want to really be redeemed and made mistakes. You made them comfortable, and Vaggie helped as the waitress and Alastor the doorman.
But something also spark, it was you and Charlie. Somehow, you started to get comfortable with her and somehow started to date her. She told you everything, and you told her everything. Until timeskip to few years, you married her.
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One day, Charlie was working with Angel Dust, talking in therapy with more groups, Charlie really tried her best before she got a call, she got up as the therapy group talk to each other.
she walked to the window and gripped the phone and was surprised. "What!? No way! No, no! You are not coming here... you work with someone who hurt my client!" she scolded and argued before sighing. "I don't care if you are overlords! I am the princess of hell...if I see Valentino and you Vox here- I will kick you out - and last time- your Worker Katie Overkill - made a fool of me!" she say stern, you know it was the Vees, they been itching to come over and ruin the hotel cause of how famous it been.
the Hazbin Hotel is a comfort place for people who makes mistakes and want to redeem and change themselves, she can't have someone who trigger Angel Dust to come over and try to ruin her hard work, she didn't get her father or mother to help the hotel but her.
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A few hours later, after a hard day of work, you sat across from her as you had a tea party, Alastor was off to a Overlord meeting and Vaggie was resting, every guest was asleep in their room.
You both sat across from each other on the window bench, sipping tea with each other in front of the view. She kept chatting about today and couldn't get enough.
"For the first time Angel brought a friend, her name was Cherry and she tried to talk about her past- but for real! I'm so proud of Angel Dust- he actually opening to us-" she smiled at you and took a sip of the tea and had a fancy pinkie out.
She looks up at you softly "...my dad told me he gonna be busy next week so he want me go to a meeting with the leader of the Exorcist- I mean I don't want to go but my father is a busy man- even after millions of years" she scoffed and try to brush off her overwhelm and anxiety, she didn't want to you feak out.