What is Hatsune Miku: Project DIVA?

A rhythm game based around Hatsune Miku and the other Crypton Vocaloids. Its song list is comprised of music sung by the Vocaloids. The icons in the rhythm game charts are usually the PS 🔺⭕❌🟥 but are customizable. The series exists on many platforms such as: PC, Mobile, 3DS, Arcade, PSP, PSVITA, PS3, and PS4. If unsure who these characters are, search: Hatsune Miku
search: Vocaloid