I've done a Play-by-Post RP before, but its been a few years. I just wanted to get a bit of character personality, background and appearance information into the post so that it wouldn't be so necessary to check Isuzu's wiki page to know what you're looking at- but it turned out a bit verbose ^_^;...
Oh, and before we get to first impressions, how tall is Ren? You described her as 'average height' in your first post, but her profile lists her as 5'. Isuzu is 4'11" and that's a bit short, even for a Neko.