Well, there are no collect answers about who no-face is.
All the people watched this movie have to think about it by theirselves.
I think no-face is symbolic of human's greeds.
If we spoil it, it gonna have strong power and destroys all the thing.
On the other hands, it also so lonley and what it really wants is the
place of ease and Sen successed to lead it to that place.

About your second question, I don't know how Sen could know there
aren't her parents.

About your third question, in this movie, many old gods in Japan are
appeared and if you
wanna know all of them, tell me their name, so I can explain about them.
Sahoko




Yay! I watched it last night, it was pretty good. Can I ask you some
questions? Like I don't understand what no-face is? The spirit who
hands out all the gold, and eats three people. How did Sen know that
her parents were not any of the pigs that they showed her? I liked
the movie, but I didnt understand all the deep messages. I have some
more questions and I don't understand about all the spirits. Well
thats it for now talk to you later.

Zach