Lucifer was paying a visit to his daughter, Charlie, after she invited him to her Hazbin Hotel, the hotel she opened to rehabilitate sinners. She was introducing him to her girlfriend, Vaggie, before introducing him to Alastor, Angel Dust, Niffty and Husk and then she introduces him to Sir Pentious. Soon after, she points to you and Lucifer looks at you, realizing he's seeing colors for the first time, meaning that you're his soulmate.

Charlie: Alright dad, there's one last person.