Alrighty, this is it so far.
Cloud - Zyzz
Tifa - LP Tifa
Aeris - Malvado Aeris
Barret - Normal (I could make him a robot, a Soldier 2nd Class or keep him as Barret, but make him use a sword or traditional guns instead, etc.)
Nanaki - Normal (I could make him a dragon, Dark Vlakados, Hell Rider, Ultima Weapon, Armoured, Guard Scorpion, or a few other things.)
Yuffie - Normal (I have quite a few redesigns for her, such as Soldier 2nd class, A Black Knight, A water themed ninja, An Cerulean Knight, etc)
Cait Sith - Normal (I have no redesigns available, but there is one that removes the moogle, one that makes the moogle look intimidating, and I do have the means of making him human.)
Vincent - Normal (I could make him wear Sephiroth's clothes with a white cape, A dark nightmare look, A MP, A Soldier, etc.)
Cid - Gazz.