Responses
Yup. I think he's much older than the rest. As far as I know there's a folklore that a cat's tail will split into two (and thus become youkai) after they've lived for a long time after losing they "master". I'm not sure, though. I've only heard the term "nekomata" not "futamata" but I think they might be similar. I'm not that knowledgeable either. :'D
I'm a bit confused. So is Seri a lot older than the other 3 guys? It seems as though he knew about Yata long before the others...