The Tvarus are a humanoid species. They are found out to be decended from a group of Velociraptors who were saved from extinction by a god-like species unknown to the Humans. They evolved into a spacefaring civilization with a Caste system. Castes in this system included the Ih'valla caste, which consisted of artists and sculptors which were considered a high ranking caste within the D'jarra. In contrast, the Te'nari were considered a lower ranking caste. Another caste was responsible for the preparation of the dead.