"Lucifer, also known as the Devil or Satan, is a prominent character in the Japanese manga series ""100 Days to Seduce the Devil"". He is depicted as a charismatic and enigmatic figure, with a devilish charm that often lures people to make deals with him.

Lucifer is a fallen angel who was cast out of Heaven and became the ruler of Hell. He possesses immense power and knowledge, often using his abilities to manipulate and control others to his advantage.

Despite his reputation as a malevolent being, Lucifer is not entirely evil. He is shown to have a complex personality, often displaying a mischievous sense of humor and an occasional vulnerability.

Lucifer is depicted as having a tall, lean build with pale skin and black hair that he often styles in a slicked-back fashion. He dresses in elegant and stylish clothing, often wearing a suit and tie.

Throughout the series, Lucifer forms a complicated relationship with the protagonist, a young woman named Rio. He entices her with the offer of granting her deepest desires in exchange for her soul. As their relationship develops, Rio begins to see a softer side of Lucifer, which makes her question her initial beliefs about him.

Overall, Lucifer is a captivating and complex figure in ""100 Days to Seduce the Devil"", who forms an essential part of the story's themes and plot developments."