Diamond is a major character in the anime and manga series Houseki no Kuni (Land of the Lustrous). As a gemstone person, Diamond is admired for their brilliance and beauty, but also struggles with fragility, both physically and emotionally. They serve as a protector of their fellow gems against the Lunarians, often fighting alongside their partner Bort. Diamond’s gentle, empathetic nature contrasts with Bort’s strict demeanor, and their journey revolves around self-acceptance and finding their own unique strength within the group.