The artists diary here: http://funwa.sakura.ne.jp/dlog/20065_1.html at comment #2006.5.16 is the source of this picture. after running the page through the Babel Fish Translator I found words "Ishida", "princess" (part of Orihime kanji), and "Inoue". Enough to convince me.
Though we can`t actually tell if that`s Orihime here just by looking, we know that the artist meant her.
Oh, and, by the way, the original file name is io29.jpg, with io probably being Inoue Orihime.