Tuturu is best known from the anime Steins;Gate, where Mayuri Shiina uses it as her signature greeting. The phrase became a favorite among anime fans and spread through clips, compilations, and short meme edits online. Its popularity comes from how instantly it signals Mayuri's gentle, cheerful personality in just a second. Even years after the series aired, people still use Tuturu in reaction videos, anime posts, and nostalgic fandom content because the sound is so short, recognizable, and easy to drop into edits.