Maron is a seemingly ordinary high school student and gifted gymnast. Her alter-ego is Kaito Jeanne, the reincarnation of Jeanne of Arc. Through the angel Finn, she receives a mission from God to seal away demons who have come to Earth to steal the beauty in human hearts. She is a lonely character who hides her feelings behind a warm smile. At a very young age her parents left her for their jobs over seas and have not contacted her since . As a result, she lives alone. She is very close with the family of her best friend and neighbor Miyako. She starts out hating Chiaki when they first meet, but falls in love with him as they become closer and the series progresses.