Tuturu is the catchphrase of Mayuri Shiina, a main character in Steins;Gate, the science-fiction story first released as a visual novel in 2009 and adapted into a popular anime series in 2011. Mayuri uses the made-up greeting in place of hello, and fans quickly adopted it as a shorthand for her kind, cheerful personality. Clips of the line spread through anime edits, reaction videos and soundboards, where its short length and distinctive rhythm made it easy to reuse. It remains popular because it instantly signals a warm, lighthearted anime reference without needing any explanation.