Ranma is the Senshi of Earth, and the planets are so connected to their Senshi that they do whatever they want such as changing weather patterns to match the Senshi’s desire. Ranma is freaked when this starts happening to her. When the sun is partially blocked, Ranma’s thoughts cause all the volcanoes to erupt causing the greenhouse gasses to keep the planet warm and preventing the great freeze. She goes to the amazons for help and learns she is their queen. She receives her past life memories and many were great influential women like Mulan or Xena. (Sailor Moon Crossover.)