I remember an Anime Addventure tread in which Ranma fell in the spring of the drowned girl. What really fell first in the spring was a character from Touhou that only take a bath there and the spring copied him/her. Of the options taken by the writers, Ranma's cursed form is Cirno, Yukari Yakumo, and a Yukuri.
Just for fun I chose that Ranma turns into a random Touhou character each time and with a bit of their personalities,
Spring of Drowned the Unknown Alien Warrior in Strange Black Armor (aka Metroid Prime/Dark Samus).
Dark Samus survived only to fell trough a space/time wormhole into a spring in Jusenkyo.
Dou you want to know how Dark Ranma answers in his figths? Charged Phazon Beam!