Physically, they are humanoid with blue skin and prominent tissue on their faces.
Their ships were relatively powerful and patrol Nasari space. They would attack without warning any ship carrying a Taresian or a person who is in the process of becoming Taresian. This is due to the nature of the Taresian mating process; males of other species are infected by a retrovirus and proceed to become Taresian so the women can kill them. However, the Nasari are relatively friendly toward other races outside of this conflict.