Ruby is the daughter of Lucifer and Lilith, the rulers of Hell. She was tired of living in the underworld and wanted to know how it’s like to live on Earth, so she moved out. That’s when she met her girlfriend Ashley Spice (everyone's favorite kitty gal) and BFF/sidekick Nathan, a human tinkerer. He was very amazed at the sight of her, so they became besties and later lovers. Being a demon, Ruby has the ability to possess people and is also pretty mischievous yet friendly.