Mayoi Hachikuji is a character from Bakemonogatari, the 2009 anime adaptation of Nisio Isin's Monogatari series, where she appears as a lost schoolgirl who repeatedly crosses paths with the protagonist. Her distinctive way of announcing herself became a recognisable catchphrase among fans, and clips of her voice spread through anime edits, TikTok videos, and soundboards. Creators still use it because the short, confident announcement works as a universal entrance cue, even for viewers who have not seen the series.