Jeanne (ジャンヌ Jan'nu) is the main Ultrawoman in Ultraman Sisters. She was a trainee in the Universal Guard, who came to Earth without permission. Because of this, her combat capacity is very low.  
After her brother died protecting the Earth from monsters, Jeanne was resolved to protect the world her brother fought for and so left the Land of Light without permission.
While leaving the building two children were attacked by an invading monster from outer space. At that time, Shota was wrapped in pink light. From the light Shota heard a girl's voice saying "Please lend me your body" but the being of light noticed that Shota was a man, and it instead merged with his sister to defeat the monster.
Jeanne's transformation item is called the Jeanne Spark.
- Ultra Water Flow: The same techniques used by other Ultras like the Original Ultraman.
- Jeanne Slash: A move similar to Ultraseven's Eye Slugger.  She cannot handle this weapon well and has even lost it.
- Sparkle Arrow: A light bow gifted to her by Zoffy because it grants power equivalent to its user, it is practically useless to her. 
- Jeanne Shot: An Ultra Beam, but only used in a dream.
- Excluding Ultrawoman Beth who was part of a team, Jeanne is the first female Ultra to star in a series.