Mikey, also known as Manjiro Sano, is the founder and leader of the Tokyo Manji Gang in Tokyo Revengers, the manga by Ken Wakui that became a popular anime series in 2021. His relaxed, childlike manner contrasts with his reputation as a formidable fighter, making his casual lines especially quotable among fans. Short voice clips like this bye bye spread through anime edits, reaction videos and soundboards, where they are reused as quick character tags and farewells. It remains popular because it instantly signals both the series and Mikey's easygoing personality in just over a second.