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.
Miku Sawai
She released her first album "Sentimental" on June 5, 2013. She then released the single , whose title track was used as the first ending theme to the 2013 anime television series "Kill la Kill"; the single peaked at 37 on the Oricon weekly charts. She released the single on August 13, 2014, whose title track is used as the first ending theme to the anime television series "Akame ga Kill!". She released the single on January 28, 2015; the title track is used as the ending theme to the anime television series "".