The Vironat were a humanoid civilization that belonged to the Breen Confederacy. They had gray skin (which turns bright pink when injured) and two sets of cleft limbs (with arms and legs branching in a pronged formation) with sensory organs that gave them a high level of sensitivity to their surroundings, including to movement. While this provides a natural benefit for jobs such as an engineer, it disadvantaged them with a sensitivity to vigorous motion, such as in the case of rough space travel. At least one individual did not seem to care for cold environments. (ST - Typhon Pact novel: Plagues of Night)