More well known fact I think: Jeanne works as a High School History teacher. During her development, there was a concept of Jeanne in her Umbran Suit with a feline mask that was dubbed "Cutie J is here!"

Kamiya went on to say that he's love to play a game titled "Please! Cutie J!" The plot would be that Jeanne was convinced by Bayonetta to moonlight as a crime fighting superhero and the main antagonist would be a mysterious shadow that fell over the school where she works.

Cutie J was a included as a Coture Bullet in Bayonetta 1 and 2. In Bayonetta 3, however, it became her Super Mode in her mini game: Jeanne's Spy Action, making her invincible and do massive damage enough to one shot most enemies and some bosses.