Rain Devilla is the leader of the devils. She's absolutely heartless and loveless, and wants to destroy all love on earth. And she has cartloads of minions to help her out. (Sadly, I only know anything relevant about one of them.... ^^;)
Pluie is the first of Rain's minions to make an apperance. He worked with Jamapi (Before Jamapi became good) to find the saint something four and destroy all love. On a sidenote, Pluie is french for rain. Hmm...I think I see a pattern forming...