Maron Kusakabe is the central protagonist of the series Kamikaze Kaito Jeanne. She appears as a typical high school student attending Momokuri Academy, where she is known for her cheerful demeanor and skill in rhythmic gymnastics. In reality, she is the reincarnation of Jeanne d'Arc and, with the aid of the angel Finn Fish, transforms into the phantom thief Jeanne. Her mission is to seal demons that inhabit beautiful art objects and prey on human hearts. When she defeats a demon, the artwork vanishes, making her appear to be a thief in the eyes of the public. She uses a special hair ribbon to initiate her transformation and wields a pushpin to strike demons, shouting Checkmate to seal them into chess pieces.

Behind her bright smile, Maron is a profoundly lonely person. Her parents left her at a young age to work overseas and eventually divorced, leaving her to live alone. This abandonment left her emotionally guarded and unfamiliar with love. She hides her true feelings behind a warm facade, making her appear approachable while struggling internally. Her initial interactions with Chiaki Nagoya are hostile, but as he becomes her classmate and rival phantom thief Sinbad, she gradually opens up. Chiaki initially feigns affection to hinder her mission, but later develops genuine feelings for her. Maron, confused by her own emotions, learns to trust and love as the story progresses. Her closest friend is Miyako Toudaiji, the daughter of a detective pursuing Jeanne, which creates tension when Maron must keep her identity secret.

Maron is driven by a sense of duty to God and a desire to protect humanity from demonic influence. She often places others well-being above her own, showing courage and selflessness in her battles. Her development involves overcoming her emotional isolation, learning to accept help from others, and reconciling her dual life. By the end of the manga, she marries Chiaki and they have a daughter named Natsuki, symbolizing her growth into a mature and loving person.

Her notable abilities include her transformation into Jeanne, which grants her enhanced agility and combat prowess, as well as the power to seal demons. Her background in gymnastics aids her acrobatic movements during night missions. She also becomes more adept at using her pushpin weapon over time. Throughout the series, Maron remains the key figure whose actions drive the plot, balancing her ordinary school life with her supernatural duties.