In life, Sunny was a ballerina for a certain show when she was six, which led to her downfall. She became a lot meaner to the kids, and a lot more greedier. She once bullied a girl so hard, she quit and had Sunny had no regret. She was ready to perform her act with my new clothes, and that led to her unfortunate death.

Sunny's demise came to her when she was getting ready for her act. In the middle of the act, The stage lights fell on her due to unstableness. She was screaming and crying for help, but everyone just decided it was apart of her act. When she died out of getting crushed to death, THAT'S when they realized she was dead.

In hell, Sunset got picked up by a hellborn boss who was making a company for young souls in hell. He treated her like a daughter. He died when Sunset was away. She made herself known by lashing out at an overlord and beating the ever-lasting shit out of him. A lot of people watched the fight go down and after that, she decided to take the role of making sure everything goes well and became the boss at 19 years old, but still deeming herself as a worker. Nowadays, she spends her life producing shows that air on TV and she does not like them at all.

(Continue the story, like how you meet her or about rivaly between her and Valentino. Or her encountering Alastor? Whatever, that's your choice)