The most warlike of the Xindi species, impatient with the Council's caution, whose commander Dolim seizes the weapon and tries to destroy Earth on his own authority.
The Xindi-Reptilians are one of the five surviving Xindi species in the third season of Enterprise. They are scaly, cold-blooded soldiers who supply much of the Xindi military strength, and the other species regard them as untrustworthy and quick to violence.
Under Commander Dolim they repeatedly go behind the Council's back. They attempt to build a biological weapon, a scheme that takes three of them to Detroit in 2004 in Carpenter Street, and they capture and brutally interrogate Archer at Azati Prime.
When the Council begins to believe Archer, Dolim kills Degra, kidnaps Hoshi Sato to break the weapon's launch codes and takes it towards Earth. He also turns on his Insectoid allies when they waver. Archer's team boards the weapon above Earth, where Archer kills Dolim and the device is blown up.