It's fiction. The story of Pope Joan emerged in medieval legends. These tales often lack reliable historical sources. The Catholic Church, which keeps detailed records of its pontiffs, has no record of a female Pope. So, based on historical research and the official records of the Church, it is a fictional story.
Red Joan has roots in reality, but it's not a completely accurate retelling. The story likely combines factual elements with creative storytelling to create a compelling narrative.
The story of Joan of Arc is true. She was a courageous and influential figure. Many historical accounts and research support the authenticity of her actions and the events surrounding her.
The story of Pope Joan has elements of both fact and fiction. Historians have different opinions on its authenticity. Some claim there's evidence to support it, while others dismiss it as a fabricated tale.
I'm not entirely sure as I haven't read it in detail. But generally, it might be about a character named Joan who has some significant story associated with the color red, perhaps red symbolizes something important in her journey, like passion, danger or love.