Amethyst is a fictional character from the anime and manga series Houseki no Kuni (Land of the Lustrous). Amethyst actually refers to a pair of twin gems, known as Amethyst 33 and Amethyst 84, who work together as a combat team. They are known for their teamwork, coordination, and skill in battle against the Lunarians. Amethyst's calm and composed demeanor contrasts with their strong sense of duty, making them important supporting characters in the series' exploration of identity and purpose.