I have absolutely no crit to offer when it comes to characterization. Your characters are all so much fun and distinct. I think it's fantastic that you can play such a wide variety of characters and still make them very much their own selves and own voices and own characters.
I especially love Koryuu lately. His prank log was fantastic and his reaction to Kohaku going home was pretty entertaining, too. Oh, also him being a chicken. That's pretty fantastically hilarious.
I also think that you've done a good job of stepping up MR's flirtiness without making it TOO much or reducing him to a one-trick pony. It's also great to see him around a bit more lately, as well, as he's one of my favorites of yours (not to say I don't love everyone you play, of course).