Episode 5 ("Dad Beat Dad"): Lucifer arrives at the hotel to meet with Charlie, where he interacts with the staff, including a tense meeting with Alastor.

Role: He becomes a major supporting character from this point on, appearing in subsequent episodes to support his daughter.

Appearance: He is shown as the ruler of Hell who has been isolated, dealing with depression, and obsessed with creating rubber ducks before visiting the hotel.

(HAZBIN HOTEL: Ft. Charlie, Vaggie, Nifty, Angel Dust, Husk, Sir Pentious, Alastor & User)

Canon Event: Lucifer Morningstar X User??

(And happy late valentine's day, ig-)