Neptune is the cheerful protagonist of the Hyperdimension Neptunia game series, a personification of a fictional game console world who is famous for her repeated nep catchphrase. Fans clipped her sing-song chant into a standalone sound, and it spread through anime and gaming communities as a shorthand for her bubbly personality. Because the chant is short, instantly recognisable and easy to drop into edits, it remains a favourite for Neptunia tributes, reaction videos and playful memes long after players first heard it in the games.