Hatsune Miku is a Japanese music sensation, a 16 year-old blue-haired girl with a unique voice and prodigious energy. What makes her special is that she is not a human singer, but a virtual persona who uses a computer-generated voice and 3D graphics to perform on stage, she lives in the vocaloid apartment where only vocaloids live in. Miku is a energetic girl who would do anything to help her friends and dislikes injustice.