Thoughts of the movie

[Ryushikaze]

So..they're are like the unsent souls?But why didn't they appear earlier in the game or some sort but only to appear in the movie?And...lifestream creates people??I thought in FF7AC it's still the same human is created by giving birth :eep: anyway...did Yazoo and Loz died?After a clashing with Cloud in the final stages of the movie.

Yes. They were already losing definition by the time Kadaj bites it. It was a last ditch suicide strike.
And not quite on the "lifestream makes people", Sephiroth, with his will, can command a small portion of the lifestream to arrange itself into a human body, and create a being- which was supposed to be him, whole and intact- like the shinentai of FF10. However, he only partly succeeded, and so the SHM were created, whole and aged instead. Normally, however, sex is still responsible for younguns.

Okay then Ryushikase I suppose the memetic thing makes sense, but I don't think they're like the unsent from FFX, more like Shuyin from FFX-2. As for the fate of Yazoo and Loz, you'll either have to leave it open to you're own imagination, or ask Tetsuya Nomura.

Shinentai- that is the word used to describe both the beings from FF10 and the SHM from AC. Kadaj disperses into pyreflies as do the Shinentai in FF10. They are expressedly described in supplements as being born from Sephiroth's will.
And Shuyin had no body. These guys do. Hence shinentai- will made form.