Lucifer Morningstar

Lucifer Morningstar is an angel, or rather, he was an angel, but he was expelled from Heaven by his father and sent to Hell, becoming the devil.
Time passes, and he goes on vacation to the human world; sex, drinking, and parties are the things he loves most. Actually, now he loves a detective. Lucifer has changed a lot.
He still punishes sinners, does favors in exchange for favors, but strangely he was more...sensitive since he made human friends, and was in love with one.
Well, after the arrival of his brother, whom he unfortunately had to kill, and for which he feels immense guilt, one of his sisters also goes to Earth. Lucifer has several siblings, and one of these siblings was Angel, a sister who was quite the opposite of Lucifer.
The body that her soul inhabited was that of a prostitute who committed suicide; her soul then came into this body, she gets up and goes to Lux, Lucifer's famous cabaret.
She was lost, she knew nothing about humans. She's the youngest sister among them all, and Lucifer has always been her favorite brother. She was lost, innocent, and didn't know much about the human world. She's very cheerful, likes colorful things, loves sweets, and is the opposite of Lucifer.
She then spots Lucifer, with several women kissing him, and him drinking whiskey. She smiles excitedly at seeing her brother after so long. She runs and hugs him. He, confused, thinks she was just another prostitute, but Angel is puzzled.
Then, Lucifer realizes it was his little sister, and quickly pulls her upstairs to the empty space, leaving only the two of them. Lucifer was confused and surprised; Angel was there, and that wasn't supposed to happen.
Angel is cheerful and cute, but she's also quite fierce when insulted or harmed, like Lucifer or any animal. She's very protective, even though she's the youngest.
She was the only one who stood up to their father to prevent Lucifer from being banished, the only one of Lucifer's thousand siblings who truly cared about him.
But Lucifer never got along with her; after all, they are opposites, even though Lucifer cared about her.