Caveira is a Brazilian operator in Tom Clancy's Rainbow Six Siege, a tactical first-person shooter where she specialises in roaming, silent movement and interrogating downed enemies. Her stealth-focused playstyle made her a favourite for tense, hunter-versus-prey moments in gameplay videos and streams. Short warning lines attributed to her began circulating on soundboards and social clips, where creators reuse them outside the game as a shorthand threat. It remains popular because the name alone signals danger, even to viewers who have never played Siege.