What is your idea of the ultimate fighter/hero/villian guy. Any class from any game that deals with FF, weapons, armor, skill set, anything and everything can be put into your character. Who knows, I might even set up a tournament to find out the ultimate champion...
Me? Well this is what I'd have:
Name: Rai Shadowblade
Class: Fighter/Assassin
Skill Set: twin strike
Right hand: katana type weapon-mid size
left hand: another katana type weapon-mid size
secondary weapon: twin knives with a chain that can become any length
armor: chain link armor with studded leather underset
optional equip.: claw-type-things on knuckles for climbing walls
Style: use the main weapons in acrobatic fighting style twisting and turning and slashing. Use the twin knives to trip up and disable opponents allowing for a quick kill with the blades, also using the blades as projectiles hitting enemies in neck and bringing the blades back to my hand. Use the shadows as an ambush tactic.