If he's a Technician that bokken could break down walls with the proper techniques. I can see it now, some guard saying, "It's just a stick..." right before his head slowly falls off his shoulders as the badass walks away.
You said "mega-powerful NPC" and I thought "Hm....could it be ?" took a glimpse into the "Gaia"-Sourcebook which said "He appears as a young man with long white hair and dark eyes. He always wears the same white trench coat, which is slightly rugged and worn with the passage of years." and...yup....fits perfectly...its "him"
I checked out the kickstarter project and was wondering if you think they may ever include a pledge of a physical copy of the artbook? I can say for sure that I would pledge if that came up But if one is ever made down the road, I know I'd still buy it, haha.