Via the Rockman Unity blog, we have the rare chance to read an interview with Zero series character designer and illustrator Toru Nakayama. More recently, Nakayama was the character designer for Inti Creates' Dragon Marked for Death. He returned to the Zeries to create the boxart (and other goodies) for the Mega Man Zero/ZX Legacy Collection, as well.
Grab a cup of coffee because this is a lengthy interview, albeit with some information you may not have heard before. Nevertheless there's some very interesting information to be found!