Stryke

The Strykes were a force on Agrovan Seven who were at war with the Marats. They could be identified by their thin mouths, Human-like eyes and broader faces, and for their blue armour.

The Stryke had been at war with the Marat for fifteen hundred years and both were evenly matched. Eventually, a Time Lord was able to smuggle a bioweapon virus to the Stykes, allowing them to gain the upper hand. When the Doctor and Ace came to the planet, they were encountered by a Stryke force. They were captured and brought to the Stryke headquarters. They believed that the Doctor was the Time Lord who brought them the bioweapon and that he had brought them more weapons. When the Marat began an air strike, the Doctor and Ace were able to escape and get to the Marat. (IDW: The Forgotten)