Hatsune Miku

Hatsune Miku, (Japanese : 初音ミク), also called Miku Hatsune, is a Japanese virtual singer created by Crypton Future Media and its official character portrayal of a 16 year old girl with long turquoise ponytails. Miku's personification was launched as a virtual idol and performed on stage as an animated projection.
Technology.
Miku uses Yamaha Corporation's Vocaloid 2, Vocaloid 3 and Vocaloid 4 vocal synthesis technologies. She also uses Crypton Future Media's Piapro Studio, a stand-alone vocal synthesizer editor. She was the second Vocaloid sold using the Vocaloid 2 engine and the first Japanese Vocaloid to use the Japanese version of the 2 engine. Her voice is based on that of Japanese actress Saki Fujita.
Naming.
The character's name comes from a combination of the Japanese words for first (初, hatsu), sound (音, ne), and future (ミク, miku[a]), meaning "the first sound of the future", referring to his position as the first in Crypton's "Character Vocal Series".