Miku Hatsune (初音ミク, lit. "first sound" and an alternate pronunciation of 未来(みらい, mirai), "future"; often written as Hatsune Miku even in English-language contexts) is the first character in the Vocaloid 2 Character Vocal series, released on August 31, 2007 by the Hokkaido-based software firm Crypton Future Media. Thanks largely to the Japanese Internet forum 2channel (the same site that birthed characters Shii and Giko, among others) and the video-sharing website Nico Nico Douga, Miku has become one of the most recognizable pop culture icons of the 21st century. She is typically pictured with a negi (Japanese variant of the Welsh onion, often mistaken for a leek) in her hand, a theme which has been replicated many times in mainstream Japanese pop culture (notably the infamous scene with Orihime Inoue in episode 2 of Bleach).
Notably, Miku made a cameo appearance in an episode of Zoku Sayonara Zetsubou Sensei where she auditioned for a voice-acting role.