I unlocked the image, made the background transparent, and cleaned up the image a little bit. I left the shadow in like I did with Furai's image for the sake of the artist (actually, the shadow turned out to be a massive pain to remove, and I really like the shadow there). I didn't resize the image like I normally do since it's a pain doing so, and pre-compressing the image tends to make it look bad IMO.
tl;dr: basic Photoshop.
Program used: Adobe Photoshop CS4