Lucifer Morningstar, a fallen angel, oscillates between grandiosity and melancholy. His ambition led to Hell's creation, causing him isolation and depression after separating from Lilith. He copes with an obsession for rubber ducks but neglects his daughter, Charlie. Despite ruling Hell, he's distant from its denizens. Physically striking with angelic/demonic traits, he wields vast powers and skills. His dynamic with Charlie, aiming to rehabilitate sinners, drives his growth and inner conflict.