Fan service:
Since (y/n) gonna be a total mega Fangirl for Gabriel Ima make her buy merch. She'll end up reading fanfics and finding lemons and smuts
A online friend of her's by the username Gabebea999. Who will explain simple things like words and meanings to the 'innocent' kitten, making her more intresested and maybe watch porno or ask luci about it, most likey leading up to a Lemon.
Plot:
Lucifer would find out that the kitten is intressed in learing about her forgotten past. That he knows more than a little about, which he hesitant to reaval to her.
When she eventually find out most likely on accident she'll revert to her cat form, for weeks on weeks, not talking and beaely eatting, and especially keeping her distance from Luci. Hissing and swatting at him if he even trys to pet her.
Sooner or later he'll begin to start and revert back to the hermit habits she was slowly pulling him out of. This behavior and their relationship worrying Maou and Ashy, who would make a plan.
Ashy would than take (y/n) out of the house, while Maou corners Luci in the house. Both parties discussing ways to get one or the other to apologize or at least get along.
Luci would give in and talk with (y/n) next time he saw her. Ashy would almost convense (y/n), till he sub-contagiously defends Luci, making the kitten run away in anger and back to where she first woke up in the alley.
After a while of looking for the kitten, Ashy would go home. Luci woild be anxious yet excited to talk to the kitten when she gets back, intill Ashy comes in the house alone.
Luci would be pissed and pull up the tracker he planted on her collar, only yo find the connection was killed, she must have known and smashed it when running away for Ashy, but Luci was able to pick up its last activated spot.
Luci would have Maou call everyone over, dropping Chi at the police station to file a missing pet/ person report, while the rest of them go to the last activation spot and spread out.
After no one got any results they all regrouped at the house, everyone surpirsed to see how broken Luci seemed at the moment. Yet non of them noticed that Emi never returned, Emi was at the crossing light she first found (y/n), and like magic there was (y/n). Emi picks up the kitten, the tired kitten allowing it, under one rule she couldn'ttake her back to the devil's castle. So instead Emi takes the kitten to her own apartment.
The kitten was back to her humanoid form only with a blanket now covering her, as she explained to Emi what she had found/figured out.
Luic was inchrage of killing off the small demon rebellions againt the dmeon king, killing a wrongly accursed loyal group of demons, it turned out to of course be (y/n)'s family and friend. She was well hidden and watched the masscara.
She was taken in by unknowing humans as a pet, it was a easy life. Till one day after the devil's and hero's show down, the last general was gone, all order gone choas broke out. Demon fighting not just among their selves but as we'll as against the humans.
With her bad luck she ended up in the middle of some fighting, alomst breaking her leg trying to escape, using the last of her powers to escape death she found her self in Tokyo.
After hearing that Emi helped (y/n) get dressed . Emi told her how worried Luci and the others we're, and reinsured the kitten she would be safe their, yet the kittenstill declined.
As Emo walked in everyone watched her, she infomed everyone that the kitten was safe at her place and didn't have an intrest in returing yet. Luci really did miss his kitten as the days turned into weeks
After some time while Emi was at work you wrote a note to her getting dressed in one of her dresses, that felt way to tight around your chest. Tucking your tail(s) away and putting a hat on your ears.
Luci was home alone, both Ashy and Maou we're at work, yeah Ashy got a job, for now, he's just a cleaner.
When she got home, she found she was locked out. She knocked with no response, she knocked again and got a yell from Lucifer saying "go away". She stopped savoring the not forgotten yet extremely missed voice of her Luci's.
She knocked again, she was oncw again getting yelled at as the male made his way to the door, stopping himself when he saw her face. {Cue shrek} Silence fell upon them as they stared at each other. (Y/n) began to say hi. He stayed silent, she smiled missing the sight of him. He moved out the way of the door allowing her in.
She sat ontop of the table as he walked over to her. She was about to speak when he wrapped her into a deep strong hug. They both were about to cry, pulling away she looked at him and connected their lips. Sliding off the table onto his lap as he sits on the floor.They both smiled into the kiss his arms around her waist and hers in his hair. Tears running down both of their faces. They never knew how much they needed each other.
Maybe they fuck as a apology.
Most likey they pull away and Luci apologizes and she says she hopes one day she can accept it. Promising she wouldn't run away again, but she did need more time to accpet everything following in as she had began to remeber ever since she first found out.
~The End~