Tuturu comes from Steins;Gate, the visual novel adapted into an anime in 2011, where it is the signature greeting of Mayuri Shiina, voiced in Japanese by Kana Hanazawa. Mayuri uses it as a cheerful hello whenever she arrives, and fans quickly adopted the phrase as an in-joke for the series. Clips of the line spread through anime forums, AMVs and soundboards during the 2010s, becoming a shorthand for cute, innocent energy. It remains popular because it is short, distinctive and instantly identifiable to anyone familiar with the show.