It looks easy, but it was a huge pain in the butt to get the scalloped edges to look right. ;_; AH!! What a nightmare!
This isn't really an "official" Vocaloid. She is more like a virtual idol in Japan. She is part of a pair with another cute kitty girl named Mee. They do have a CD out in Japan, but never were confirmed as official Vocaloid characters. Weird.
Official website for them is here: [link]
Photo by the lovely Laurel Joly