Tutturu is the catchphrase greeting of Mayuri Shiina in Steins;Gate, the science-fiction story first released as a visual novel in 2009 and adapted into an anime series in 2011. Voiced by Kana Hanazawa, Mayuri uses the playful sound whenever she greets her friends, and fans quickly adopted it as shorthand for her cheerful personality. Clips of the greeting circulated on anime forums, video sites and soundboards, where editors reused it as a light-hearted hello. It remains popular because it is instantly recognisable, easy to drop into short videos, and carries the warmth of one of anime's most beloved supporting characters.