First off, I feel like the voice you're using is a bit gruff and malevolent. He's not a villain, but more of an anti-hero. A pragmatic greedy merchant with a chip on his shoulder who wants to leave behind a better world for his friends but generally just dislikes everyone who has ever wronged him and doesn't trust the rest of them. I like the intensity and the maniacal laughter, but I don't know if it is a fit for Naofumi. However, I would look at doing an audition for Motoyasu or Aultcray (if you can sound 40-60's). Also, as interesting as it would be, I think you should also audition for Elhart! The gruff sound in your voice would fit him rather well!
shut up cracker dont talk like that billie