I think it's the moon itself.

Dancing for me = maybe referring to the moon how it's dancing around earth
you don't know the danger = no one knows what rinoa will do
But time will pass
and you get close to me = going up to the spacestation via the lunar gate

An evil thing happens = the lunar cry
You can't stop it = it's so massive
neither can I = again, so massive
the only thing i can do
is cry = all the moon can do is cry