I know the Ultimania Omega. But we have to work with something. Even if calling him an "unsent" isn't that accurate it is fitting because feelings are part of the spirit/soul itself and in Final Fantasy X the pyreflies are the life energy, the memories, the knowledge, et cetera itself. Pyreflies are the same than the lifestream of Final Fantasy VII like it is stated in the Ultimania as well because it's the same universe. So technically it is part of the real Shuyin.
EDIT: I really am not interested in your "no they can't" replies. I use the Ultimania and the story line text as well and combine it with logic when there is no 100 % explanation. So I know the truth and what should be the truth when it is not 100 % clear. And becoming a Fayth/Aeon means you have to sacrfice your live. So calling Jecht a "living" man is wrong. When you are a fayth you have sacrificed and sealed yourself away so other summoners can obtain your power. Of course it is not exactly the same with the final aeon because every final aeon is different but fayth are not in a status of "living". And to your "where the hell..." - I have not said it is like that. I have said it should be like that. And I am sorry bur as long as Square says the pyreflies and the lifestream are the same substance I am right because I just say what Square says and only Square is able to decide what's the truth in Final Fantasy or where an own opinion is good in atopic where no truth exists.
So don't act like I would not use the Ultimania Omega because I use it and I even can read it so there is no necessity in waiting for a translation which is probably full of mistakes.
Also it is officially stated the european version has a translation than the american one. The european words instead of "unsent" are "without body or bodyless". What is Shuyin during Final Fantasy X-2? He is bodyless. What is Jecht? He is bodyless. Of course he appears in form of [Sin] so yead - just forget Jecht. But the other fayth have no bodies as well. They just appear in form of summon when you call them. Otherwise there are just ghosts like you can see them often. So the definition of mine why I call them "unsent" even if you don't is correct. They have no bodies.
That was no reply to ForsakenLover.
And I am sorry if I have offended you but I do not like it when other people try to be part of a discussion which is not their business. Even when it is not the right topic which is obvious because I have stopped the conversation with ForsakenLover here.
So in case there still is interest in a discussion ---> PM me.