@ S121
I actually forgot his one style of combat he tends to favor. I got the idea from Phantasy Star: He uses a sword in conjunction with a hand gun. Of course in my story it's redundant considering the blade he uses is also a Gunblade. The fact he uses a gun as is, is a stark contrast to Part I's Aion. The reason will become prominent eventually.
Also I'm rigging up a minor bio if I were to consider it further...
Character: Revere Exorco
- OC -
Power: Sword Master
Weapons: Katana
Dual Sabres
Hand Gun
Weaknesses: In overall strength, he is weak.
He chooses to use skill as his metaphorical armor, therefore he could be easily killed. However, he doesn't go down easily and will withdraw from a fight when wounded.
Appearance: 
Except hair is spikier and does not cover an eye
And jacket is closed w/ a sleeveless undershirt (the kind where it only goes over one shoulder that you normally see something of the oriental genre wearing)
Jacket has a red phoenix on the back
Personality: Mysterious in ultimate motives, he tends to seem brutal in his tactics and uncaring overall, but there are times when no one can get a real good read on what he really is like.
Morality: From my story's part I, you would think he's the ultimate incarnate of evil. in Part II, his true motives are revealed and you start to question whether he is good or evil.
Biography: A Sword Master that has trained his whole life. He seems to be against game characters...but otherwise his motives remain unclear.
Traumas: In my story: He relived the same war 1,000 times over, seeing the same people die over and over, most of which he cared for and he once called friends. (time travel + immortality + having to play the bad guy to set things right is a b*tch.) In this...I would have to work out something similar...
Notes: Combat Prowess:
His combat prowess would be if Raiden/Sam didn't have augmentations. In CQC terms in my story, he is like the "Dark Link" of the story, because one, he is Aion from the future, and two, his skills have been refined for over a thousand years. Of course to adapt this, I would just say he's been training in the art of the sword for his entire life.
He can read people like a open book in combat, thus he can parry most attacks. Spartans would be easily able to overpower him, but in speed, he would give them a run for their money. Of course, he adapts his fighting technique according to what he's up against. if he was against like John, then he would keep himself at mid range so he can duck in, make a jab, then move out. Then if he was against like say, a Touhou character using Danmaku, his strategy would be to get in close and use one decisive strike. Against someone like Link, he would use defensive counters in order to play out for an opening. He will more often than not bide his time waiting for an opening rather than press the attack.
In addition: he prefers to dual wield his blade with his hand gun...
EDIT:
So now I gotta decide: sword master, or sniper assassin? hrmmm....what would you like to see?
EDIT 2: And part of me thinks I could just use a game character from Phantasy Star...I actually think that was my initial plan at the beginning...hmm...reason why I say this is cause the guy in the picture is from Phantasy Star...