It's very JPG-artifacty... I'd say it's "ok" but not more than that. A better quality scan would be a great addition to the site, Queen's Blade is quite popular around here I think.
(Note: The tag for Queen's blade is Queens_blade, and this image would be considered safe I think. Fixed these things for you.)
Same character designer, Hisayuki Hirokazu. He might also be the author of this specific picture, but we can't tell for sure unless someone looks it up on the book.