Hatsune Miku—or just Miku—is a culturally popular Japanese vocaloid developed by Crypton Future Media who came into play initially on August 31, 2007, and with stability on August 31, 2016. She is depicted as a sixteen year-old girl with with long, turquoise twintails. In the real world, Miku is partially responsible for the success of the Vocaloid series.
In the world of SMG4, Miku appears as a cameo in a few of SMG4's videos and bloopers, mainly as a background character. However, she has never had a major role in any of SMG4's bloopers or videos. She is currently the only known vocaloid to have ever appeared in any of SMG4's videos.
Miku's name 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".
This is referring to her position as the first of Crypton's "Character Vocal Series."
Miku is voiced by Japanese voice actress Saki Fujita.
Although appearing mainly as a 2D character in the background, she has made a few appearances as a GMod model.
Ssenmodnar 7 is the only video to feature her singing one her songs, which is ぽっぴっぽー (PoPiPo), or in English, Vegetable Juice. This is observed during the last skit of the episode, where Dr. Eggman is seen rocking Dance Dance Revolution while Mario and Sonic watch on.