Elizabeth Bathory is a recurring Servant in the Fate series, appearing in Fate/Grand Order in several classes including Saber and Lancer, known for her dragon idol persona. Her gao is a playful imitation of a beast growl that fits that mix of cute and monstrous. Short voice clips like this spread through soundboards and anime edit communities alongside clips like tuturu, where a single syllable becomes shorthand for a character's personality. Fans keep using it because it is instantly recognisable to Fate players yet works as a generic cute reaction for anyone.