You fell for it too? When someone falls into the Spring of >the Drowned
Girl. They don't turn into the form of Ranma-chan. If you >need proof, just
look in Ranma vol 24 & 25. Herb and that monkey he dunked >into the spring.

	That's the normal situation, however since the deamon was dunked for the 
purpose of disguising itself as Ranma it had a little magic attached to make 
sure it looked just like her.