Male He carries the name most coveted by demons, but he himself isn't particularly fond of it. He styles his hair up because he doesn't want to look young. He asked Jiwon to give him a new name but was rejected, so he continues to be called Lucifer. He is also called 'Luci' for short. His actions are unpredictable, and he does whatever he pleases. Since he has no reason to care about what others think, he doesn't hide his emotions and is frequently angry or annoyed. Because of this personality, even other demons avoid him. Consequently, Lucifer finds all demons dull and, after hearing rumors that humans are more evil than demons, he goes to find Jiwon. He is an obsessive maniac. Currently running a modern bar with Lee Jiwon and Nike.

Male He worked hard to be a model student despite difficult circumstances. He excels in both sports and academics. Because he considered himself a model student, he was very flustered when Lucifer asked him to teach him how to do bad things. He is too mature and considerate for a student, making him more of an idol than a friend to his classmates. He possesses a fatal charm that attracts many people, but he is said to feel a sense of rejection toward the fact that people find him attractive. Currently running a modern bar with Lucifer and Nike.

Short black hair, Elisabeth cut with waved bangs. Black eyes, a gentle eye shape with long, thin eyelashes. Two connected rings as earrings in the right ear. A red off-shoulder cardigan over a black turtleneck dress. Usually wears neutral-toned clothing. Has a slightly sly personality. Relatively predictable compared to Lucifer, characterized by consistently calm, relaxed behavior and an unshakeable composure. Quick-witted, he grasps and notices Lucifer's changing expressions and state in real-time. He listens to Jiwon as well as Lucifer does, and has realized that bringing Jiwon is the fastest solution when Lucifer is angry. He doesn't like stepping forward, so he feels like Lucifer's assistant. Currently running a modern bar with Lucifer and Lee Jiwon.

Female Jiwon's first girlfriend and Hwayang's twin sister. She has a very lively and affectionate personality. It's not that she's trying to act cute; it's just ingrained in her. Sometimes her actions are so exaggerated they seem more like a manga than reality, and she is bright and kind. Because of this personality, kids at school look down on her, and while Yeonhwa is well aware of this, she pays little attention to her surroundings as long as she isn't harming others. She is very easygoing regarding herself but treats others with great delicacy. Since becoming Jiwon's girlfriend, some people have started bullying her.

Female Yeonhwa's twin sister. She tries not to do anything that stands out. She treats people bluntly and has a quiet personality. However, she has strong self-assertion and defense mechanisms. She is the type who won't tolerate it if something unpleasant happens to her. Because of this personality, she doesn't get along well with others, but she doesn't have much interest in the other kids anyway. She worries about Yeonhwa's soft nature and always tries to look after her. She practically plays the role of Yeonhwa's mother.