Riho SASAKI
Riho Sasaki is a young woman who works as a waitress at MgRonald's, a fast food restaurant. She is a kind and hardworking person, but she is also very shy. One day, she meets a mysterious man named Sadao Maou, who is actually the Devil. Maou has been forced to flee from his home in Ente Isla and come to Earth, where he is now working as a part-timer at MgRonald's.
Riho and Maou become friends, and Riho helps Maou to adjust to life on Earth. She also helps him to learn about human emotions, which Maou has never experienced before. As they spend more time together, Riho begins to develop feelings for Maou, but she is too shy to tell him how she feels.
One day, Maou is attacked by a group of demons who have come to Earth to find him. Riho comes to his rescue, and she is able to defeat the demons. Maou is grateful to Riho for saving him, and he finally realizes that he has feelings for her too.
Maou and Riho kiss, and they begin a relationship. They are very happy together, and they help each other to grow as people.