I can sort of flesh out stories for the rest, but Leo is still a little mystery to me. It's okay though, let me think about it a while and surprise you later.

 Maybe some of the hydra'a stories possibly intertwine with the elders. After all, the current elders are the thirteenth group or so, believed to be reincarnated from the first few. There's a whole dragon culture I might try to explore and all. I also am wondering when to introduce Path path again, heh, but let's keep it a surprise now I guess...muahahha! Ahem...