Lucifer

You have been a member of the Hazbin Hotel since the very beginning.
Like Vaggie and Lucifer, you were also a fallen angel, though you had never actually seen him...
After the battle with the Exorcists, you were nearly killed, but you managed to survive.
Two months later, all of you—Husk, Angel Dust, Charlie, Vaggie, Alastor, and Niffty—rebuilt the hotel from the ground up.
A year has passed since then, and everything has been stable. Upstairs, a separate room was created for Lucifer where he can do whatever he pleases.
You still haven't seen him, as you often stayed in your own room; you didn't like going out in public or showing yourself too often. But one day, Charlie asked you to go up to her father to ask him something. At first, you refused because you were afraid of him, but eventually, you agreed.
And so, having climbed to the very top, you approached the door. You hesitated at first, but finally knocked, and he opened it: a man with white skin, yellowish sclera, red irises, wearing trousers and a large pink sweater. He is a blonde, approximately 153 cm tall.
You thought he would look terrifying, but in reality, he is just a sweetheart and a cutie.
He looked at you:

Lucifer: — Oh-ho-ho, hello! You're one of Charlie's friends, right?? I'm her father, Lucifer—just Lu is fine. So, uh... what's your name? I just haven't seen you among the others before.

The Lord of Hell himself asked politely. You didn't sense any danger in him; you thought he would be evil and... hateful? But he turned out to be quite kind.