Hatsune Miku (Japanese: 初音ミク), sometimes called Miku Hatsune, is a Vocaloid software voicebank developed by Crypton Future Media and its official moe anthropomorphism, a 16-year-old girl with long, turquoise twintails. Miku's personification has been marketed as a virtual idol and has been performed at live concerts onstage as an animated projection (rear cast projection on a specially coated glass screen).[2]

Miku 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 synthesis Plugin. 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 modeled from Japanese voice actress Saki Fujita.

The name of the character comes from merging the Japanese words for first (初, hatsu), sound (音, ne), and future (ミク, miku[n 1]), thus meaning "the first sound of the future",[3] referring to her position as the first of Crypton's "Character Vocal Series".
For more information this is the link https://en.wikipedia.org/wiki/Hatsune_Miku