This is absolutely amazing! Could I use this for the J-Core group I am helping? They're called rAmen Break and they used to be on Digitally Imported on the Hardcore channel, but switched due to mistreatment. I am developing their webpage and they need some artistic content just like yours to improve what I can do for them. I would love to use this, and I would love it if I could get your approval of the banner I use this for as well.
Actually, Hatune is a romanisation of Miku's surname using another romanisation system. Hatsune IS the official romanisation of her surname, though, so you are technically correct. I do agree with you that this picture is amazing. By the way, I love your icon!
I like the way she's stretching on the chair, really makes things more comfortable. She looks like she knows exactly what she's doing. also I like that mostly everything is blue apart from the mug which makes it stand out well.
Japanese people don't have letters, they have syllables. Thus they should have the syllable "tsu", except they don't. The japanese don't say "tu" as in "tutu". When they say the syllable "tu", they prounounce it as "tsu". So, as concluded from that, when the japanese say "tsu" (ex. HaTSUne Miku), then they write it as the syllable "tu" (ex. HaTUne Miku = はつね みく)