Um...you're thinking way too 'Bleach'. Shinigami != samurai. In combat Samurai (at least later-era Samurai) wore heavy armor made of wood and metal, though not so cumbersome as full plate and mail. Out of combat they wore typical clothes for the period, the defining differences being a warrior's topknot and carrying a weapon.
Making Samurai in anything, be it game or book or what have you, a copy of some anime rip-off is truly an insult to the history of the noble warrior class.
That being said, I DO like Bleach. But no. Just no.
While I understand what you're trying to say, Samurai still dueled to the death outside of wars. Look at the Shinsengumi...a bunch of ronin tasked to protect the 14th shogun. No armor.
Anyway, I think it would be a pretty cool idea.
They appeared from the sky, the one without a heart... "Omega"...And the one who followed it..."Shinryuu"...
Final Fantasy 5