Shiteyan'yo is a bizarre and humorous character originating from the VOCALOID fandom, particularly associated with Hatsune Miku. Resembling a small, worm-like creature with Miku's signature twin tails and an unsettling human face, Shiteyan'yo was created as a parody and became a popular meme within the community. Though not an official VOCALOID character, Shiteyan'yo is often featured in fan art and videos, contributing comic relief and absurdity, and is recognized for its odd catchphrase and surreal appearance.