Actually, she's genderless like all nightmaren. She was called a he in the english version because the only known unisex pronoun in english is "it". Sonic Team says that because she's genderless, her gender is left up to the player's interpretation.
Looks absolutely great! I'd definitely give this my fave, right away! Though, one question: There seems to be some blurriness/artifacts around most of the edges. Most likely saving as a PNG, or JPEG (on max quality setting), would take care of this problem. I'd really hate that this little detail deter from the perfection that this picture has reached. :]