Mikudayō first appeared at Tokyo Game Show 2011 as a sales promotion character for the game Hatsune Miku: Project Mirai. The overall design was based on Nendoroid Miku, but the details were rough and clumsy. Her unbalanced big head, dull eyes, chubby cheeks, large rubber rain boots and forward-tilting posture with awkward movements made children scared and even cry in the show. This whole incident made a topic on a Futaba Channel bulletin board, and the contributors gave the name Mikudayō, which means "I'm Miku" or "She's Miku" as a spoof on the unlikeliness to the real Miku's design.
Mikudayō has a bad personality. She often speaks nasty words and sometimes attacks people.