Nezuko Kamado is the younger sister at the heart of Demon Slayer, the manga and anime series that became a worldwide hit after its anime debut in 2019. Fans affectionately add the honorific chan to her name, and the stretched, sing-song version heard here grew popular through short-form fan edits, cosplay videos and anime memes. Because it is instantly recognisable even without context, creators keep using it as shorthand for cute, chaotic or sisterly affection in Demon Slayer content.