[Akiyoshi]

Zest is in fact a very powerfull and impressive male knight but he form part of the minority xDU. He and presumably Scaglietty are the only male S-rankers of the show so far.

Of course, Force is doing wonders to solve that situation. Probably the EC Drivers will need their own rank system but so far Deville and tohma are pretty darn powerfull while Veyron is a bonafide badass. Also Mr. Vandin seems to be a pretty competent man of bussiness and the Raptors are all male-looking.

Apparently Tsuzuki finally noted the lack of testosterone in the cast xD!