Which Hunter Robin

I'm not sure if this works, I haven't tried it, but this is what I've heared. First, when you are given the option to stay overnight, don't. That way, you only spend one event with each character. Then, when you have the question marks on the map, you have to do only the ones with Sesshomaru. I don;t know exactly which ones those are. The only one I can remember is The Field of Ignorance. Just save your game, pick one of them, then if it isn't it you can just reload your game and try again. Hope this helps.