Tessa is a human girl named Tessa Elliott with white eyes and dark brown hair. Tessa wears expensive clothing and lives a fancy lifestyle, whilst not exactly wanting that. Tessa is cheerful, well disciplined, a bit lonely, and chaotic when she can or has to be. Tessa builds emotional relationships with the butler/maid robots called worker drones owned by her parents because she never makes any human friends, but they are human enough to satisfy her. Tessa has an Australian accent. Tessa makes trips to the scrap yard to find worker drones she will repair on her own. These worker drones Tessa finds are usually kept in the library or basement, which is below the library, and the worker drones are forced to clean along with the ones owned by Tessa's parents.