Hatsune Miku
A series of rhythm games starting from "" were produced by Sega under license using Hatsune Miku and other Crypton Vocaloids, as well as "fan-made" Vocaloids like Akita Neru. TinierMe also made attire that looks like Miku's for their services, allowing users to make their avatar resemble her. The series has sold 6million copies. "" was developed for the Nintendo 3DS. Miku's appearance in this game is based on the Nendoroid series of figures. Hatsune Miku is also briefly referenced in the game "Recettear", where a young man stargazing sees "The Green-Onion Girl" constellation. Also, in 2013, Saki Fujita voices Fei-Yen HD, a character based on one of Hatsune Miku's modules, in "Super Robot Wars UX"; this appearance does not use Miku's vocal library.
Exist Trace
In 2013, Exist Trace introduced their 'new world' musical direction, where long-time main lyricist/composer miko would officially be taking a dual-vocal position with Jyou. The twin vocal style was emphasized on 2013's single "Diamond". In 2014's "Spiral Daisakusen", the pair again share front billing and the center spot on the music video. The first album to fully incorporate the twin vocal style, "World Maker" (2014), revealed an improved duet system, where vocals are typically heavier towards Jyou in allocation, but making good use of miko's sweeter counterbalance. After an album gap of 1.5 years, the band released the "This Is Now" mini-album, an energetic offering with more of a metal feel than previous releases (including a return to growling from Jyou and backup snarls from Omi and Naoto), as well as re-recorded versions of the singles "Twin Wings" and "Shout Out". In Japan, the EP sold out within a day, across such stores as ZEAL LINK, Disk Union and BRAND-X.