One of the five sentient Xindi races bound in an imperfect alliance to launch a pre-emptive strike againts their alleged future attacker, Earth. The Reptilians are among the most militant of the group and, with the Xindi-Insectoids, the most distrusting; they retain their own separate spy and military operations. A Xindi-Reptilian was the pilot of the probe that made the initial attack on Earth.