Shinsha is a central character in the anime and manga series Houseki no Kuni (Land of the Lustrous). As a gem person, Shinsha stands out due to their mercury-based composition, which makes it dangerous for others to be around them. Isolated because of their toxic properties, Shinsha struggles with loneliness and a longing for purpose, often patrolling at night to protect others from harm. Their complex emotions and relationship with protagonist Phosphophyllite drive much of their character development and the series' exploration of identity.