I'd love to do art of any one of your characters! The only problem is that I won't be getting a tablet until maybe late January, so unless you don't mind b&w lineart, I won't be able to churn out any work until mid-February.
In any case, here are my samples, and I suppose if there is still art you need by then, I can get cracking on it. I typically do human characters in a variety of styles.
Here are some recent sketches (no color)
http://i290.photobucket.com/albums/ll252/Metroiddpfreak/625691453c780aed2c13be4cd686df33_zpsd24d057d.jpg
http://i290.photobucket.com/albums/ll252/Metroiddpfreak/43f90ad969e0a068dcf0ed6727ff499f_zpsc5c8362c.jpg
(This is some fanart lol)
http://i290.photobucket.com/albums/ll252/Metroiddpfreak/88970e82165f0757c989e8760dc13a89_zps6bb4468f.jpg
And commissions from 2-3 years ago, the first in color pencil:
http://i290.photobucket.com/albums/ll252/Metroiddpfreak/Epidemic.png
http://i290.photobucket.com/albums/ll252/Metroiddpfreak/Image12_zpsbea7552c.jpg
I can emulate typical manga styles to some extent, so if you'd like a sample of just that, I can send another sketch.
I'm looking for 2-4mil per b&w sketch (traditional or digital), and probably around 10-15mil for a fully inked and colored piece (which would be done digitally only). I'm open to alternative pricing, though :)