Go back down and destroy the north-west obstruction to find a FRAME REPAIR Z. Go up the right-side stairs, destroy the elevator lock, and press the red button to lower a ladder on the other side. In the cubicle room, check the south-eastern cubicle for a MAGICAL HAT. We need to do this on a couple more floors.
Blow up the things on the sides of the shaft (XD) to release the locks. The north wall of this room has an elevator shaft that is blocked off by emergency locks. Now head through the doors north on the other path. Beat the Fairy hiding behind it, blow up the pirate statue, and open the chest for an ETHER PACK MAX. Stick to the west side and blow up the north object for 2 FRAME REPAIR A.
Heading north, destroy the objects for a REVIVE. We're here, we're solving the problem, and things are about to get super epic.
Know how when it shows Shion and Cherenkov being 'Whitened' by Gnosis earlier in the game? Remember how their clothes 'Whitened' as well? So, since we're running around on/in a Gnosis, how come nobody is being 'Whitened'? Cherenkov even puts his hand on the Gnosis wall to steady his weakening self. We're about to make our great escape from this friggin' gigantic Gnosis, but not before a few words with our old pal Cherenkov, and just a little bit more of a trek. Hello once again, my comrades-in-space-arms.