The devil protagonist is surely an important character. And probably his co - workers from his part - time job are important too as they interact with him a lot.
The main character is the devil. His name is Sadao Maou. His human form has a normal life in the human world, working at MgRonald's. Emilia, who is also from Ente Isla, is another important character. She has her own goals and her relationship with Sadao is complex. Chiho, a human girl who has a crush on Sadao, also plays a significant role in the story as she gets involved in the world of the devil and his friends.
The main character is the devil who has to work part - time. There are also probably some human characters he interacts with.
Emi Yusa is also a main character. She has a complex relationship with the Devil as they are from different worlds but are also connected in the human world.
Emi Yusa is also a main character. She is an enemy of the Devil in their original world but in the human world, there are all kinds of interactions between them. And then there's Chiho Sasaki, a human girl who has a crush on Sadao and often gets involved in their affairs.
The devil is definitely one of the main characters. He has his own goals and motives, like trying to survive in the human world while still having his devilish nature. Then there's the girl who has a special connection with him. She might be a human, but she gets dragged into the devil's world in a way. And don't forget his workmates. They are there in the part - time job setting and add to the humor and the overall story. They might not be as powerful as the devil, but they are important for the story's development.
The devil himself is surely one of the main characters. He brings his unique personality and abilities from his devilish origin to the story. His human co - workers are also main characters as they interact with him and are part of his new life in the human world.
The main character is Satan, who is now working at MgRonald's in the human world. Then there's also his co - worker, Chiho, who has a bit of a crush on him. And there are other devil characters like Alciel who are also involved in their daily lives in the human world.
Possibly other characters from the devil's world who make an appearance in the human world in this volume. They could bring in new conflicts or help to further the overarching plot that involves the connection between the two worlds.
Maou's co - worker, Chiho Sasaki. She is a normal human girl who works with Maou at MgRonald's. Her presence adds an interesting dynamic as she unknowingly befriends a devil and her reactions to the strange things that happen around Maou are quite engaging.
In the 'devil is a part timer vol 1 light novel', the central character is the Devil. He has his own goals and personality. Another important character is the human he works with at his part - time job. This human is unaware of the Devil's true identity at first. These two characters' different backgrounds and perspectives create a lot of interesting situations and comical moments in the story.