I'm probably late but this is the first time I have heard of Hatsune Miku (初音ミク), a humanoid persona voiced by a singing synthesizer application developed by Crypton Future Media.
The name of the character comes from merging the Japanese words for first (初 hatsu), sound (音 ne) and future (ミク miku), thus meaning "the first sound from the future," referring to her position as the first of Crypton's "Character Vocal Series."