Failsafe is the artificial intelligence aboard the crashed ship Exodus Black on Nessus in Destiny 2, and her dialogue is known for swinging between a cheerful, helpful tone and a darker, more sarcastic one. That split personality became a favourite talking point among Destiny players, who clipped her lines for reaction videos and edits long after first meeting her in the game. The twin-voice contrast translates well outside Destiny too, because it instantly signals a change of mind, a hidden motive, or two sides of one character.