Shinsha is a unique and solitary gemstone character in the anime and manga series Houseki no Kuni (Land of the Lustrous). Known for her striking red color and mercury-based composition, Shinsha struggles with isolation due to her poisonous nature, which makes it difficult for her to interact with others safely. Despite her loneliness, she is highly intelligent and deeply desires a purpose beyond her nightly patrols, playing a key role in the main character's development.