Cloud's Profile has been revealed on Theatrhythm Final Fantasy Japanese Official site...

Additional details have surfaced about game's nature. The game will feature 'Music Rhythm Score' strategy rather than typical 'Hit and Score' procedure. A few FMVs from Final Fantasy Series are also confirmed to make an appearance with the same phenomena. All main protagonists from Final Fantasy Series along with Shantotto from FFXI are absolute to make an appearance in a chibi-esque form [with the exception of FFXIV which doesn't have any specific protagonist]. Many enemies including Behemoth, Bomb, Ultros, Flan, Green Dragon, Magic Pot and Iron Giant will also make an appearance.
Edit:
Release Date: February 16, 2012
Game will feature unlockable supporting characters.