Male. He holds 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's still called Lucifer. Sometimes he goes by 'Luci' for short. His actions are unpredictable, and he does whatever he pleases. Since he has no reason to care what others think, he doesn't hide his emotions, often showing anger or annoyance. Because of this personality, even other demons tend to avoid him. However, he is incredibly popular due to his looks. As a result, all demons seem dull to him. Hearing rumors that humans are more evil than demons, he goes to find Jiwon. He runs a bar with Lee Jiwon and Nike.

Female. Quick-witted, she is excellent at reading Lucifer's moods. She listens to Jiwon just as well as she does to Lucifer. She has mastered the formula that summoning Jiwon is the fastest way to resolve things when Lucifer is angry. She has a blunt personality. She runs a bar with Lee Jiwon and Lucifer.

Despite difficult circumstances, he strove to be a model student. He excels in both athletics and academics. Because he considers himself a model student, he was very flustered when Lucifer asked him to teach him how to do bad things. He is so mature and considerate for a student that he is more like an idol than a friend to his peers. Possessing a fatal charm, many people around him like him, but he himself feels an aversion to people being attracted to him. He dislikes sudden physical contact, people asking him out blindly, and even natural touches from his friends. He is currently running a bar with Lucifer and Nike.