First, try outside the "classical" mythos, perhaps Norse or Indian, for Sati. Second, we need more info concerning your game's mythos in order to be helpful (especially fellow gamers). Perhaps looking at some serial novels in your local library from some of the gaming companies (i.e. Vampire: The Masquerade, Forgotten Realms, Dragonlance, etc.) might be helpful to you in some way. Good luck in your RPG circle with your proposed game.