wow, I had spent a couple minutes thinking if it was Tidus or someone else, glad I picked Tidus

Ok here it goes...

Floating in the world up high
Overlooking the city's sky.
I come closer to reveal what is real,
As, I see you standing in the place where
I must defeat you still
But while I'm near, you'll disappear

Who am I?

eh not that good but it's my first try