Ranma shows Nabiki a magical crystal that had saved Akane’s life during the fight with saffron. The crystal changes Ranma into his female form upon contact and it feels important. Usagi wakes up feeling something is missing and is distraught to find her crystal missing. The sailor Senshi confront Ranma about the crystal and after Ranma beats them down, she recognizes Pluto. Turns out Ranma is the reincarnation of queen Serenity. (Sailor Moon Crossover.)