"Tuturu" is best known as Mayuri Shiina's signature greeting in the anime and visual novel series Steins;Gate. The phrase became a recognizable fandom sound through anime clips, compilations and memes shared across YouTube, TikTok and Discord. Its lasting appeal comes from how instantly it signals Mayuri's sweet, upbeat personality in less than two seconds. Even outside direct Steins;Gate edits, people still use it online as a shorthand for something cute, comforting or charmingly awkward.