Nyanpasu is the signature greeting of Renge Miyauchi, the young protagonist of the anime series Non Non Biyori, and it became a fan favourite because of its distinctive sound and her deadpan delivery. Clips of the greeting spread through anime communities and short-form video edits, where creators reused it as a cute reaction or introduction. It sits alongside other short anime vocal memes like Tuturu and anime ahh in fan edits and reaction videos. Its staying power comes from instant recognition among anime fans, even for viewers who have not watched the full series.