Hatsune Miku
, sometimes referred to as Miku Hatsune, is the name of a Vocaloid software voicebank developed by Crypton Future Media and its official moe anthropomorph, a 16-year-old girl with long, turquoise twintails. She uses Yamaha Corporation's Vocaloid 2, Vocaloid 3, and Vocaloid 4 singing synthesizing technologies. She also uses Crypton Future Media's Piapro Studio, a singing synthesizer VSTi Plugin. She was the second Vocaloid sold using the Vocaloid 2 engine and the first Japanese Vocaloid to use the Japanese version of the Vocaloid 2 engine. Her voice is modeled from Japanese voice actress Saki Fujita. Miku's personification has been marketed as a virtual idol and has performed at concerts onstage as an animated projection (rear cast projection on a specially coated glass screen).
Miku Flick/02
Unlike its predecessor, the game featured vocaloids other than Hatsune Miku, including Kagamine Len, Kagamine Rin and Megurine Luka as well as duet songs whereby two vocaloids would sing together for a song. The game also included a new "Extreme" difficulty mode, which provided players with a difficulty between that of the "Hard" and "Break the Limit" modes, retained from the original. The game also provided additional Downloadable Content via the In-App Purchases system that would include new songs and seasonal costumes. The additional "Replay Mode" was later added, allowing players to save a replay of their performance and share it with friends.