Cero attacks come from Bleach, the long-running manga and anime series about Soul Reapers battling Hollows. In the series, Hollows and Arrancar concentrate spiritual energy and fire it as a destructive beam, and the sound became closely linked with characters such as the Espada during major battles. Clips of the blast spread through anime fan edits, gaming montages and reaction videos, where its charging build-up signals that something powerful is about to happen. It remains popular because it is short, dramatic and instantly recognisable even without any picture.