Cero is a signature energy attack from Bleach, the long-running anime and manga about Soul Reapers, where Hollows and the Espada fire concentrated blasts of spiritual power from their mouths or hands. The name comes from the Spanish word for zero, reflecting its destructive, empty nature. The sound has travelled beyond the anime through fan edits, gaming clips and Roblox experiences such as Item Asylum, where laser-style weapons recreate the same charging blast. It remains popular because the rising charge instantly tells viewers a devastating attack is coming.