Hatsune Miku, officially code-named CV01, is a Vocaloid software voicebank developed by Crypton Future Media. Its official mascot is depicted as a sixteen-year-old girl with long, turquoise twintails. From Wikipedia
Japan’s mobile rhythm game rolls out August 4–13 with Phantom Thieves–themed outfits, free login gifts plus a Vocaloid ‘Life Will Change’ cover; global timing remains unannounced