Cairngorm is a major character in the anime and manga series 'Houseki no Kuni' (Land of the Lustrous). Cairngorm is a gemstone person, originally part of the gem known as Ghost Quartz, sharing a body with another entity. After separating, Cairngorm gradually establishes their own identity and struggles with feelings of loneliness and purpose. Throughout the series, Cairngorm's complex relationship with other gems, especially with Phosphophyllite, significantly impacts the story's development, exploring themes of self-discovery and transformation.