Roporak were one of the six breeds of Visorak which invaded Metru Nui. Roporak had the ability to blend into their surroundings, becoming virtually invisible. This made them excellent spies for the horde. Their Rhotuka spinners could disrupt the function of living creatures, causing an abrupt "power outage" effect. Of all Visorak, Roporak were capable of launching their spinners the farthest distance.
Roporak were commonly used as spies for the Visorak horde. They had the power to blend into their surroundings, becoming virtually invisible. In battle, they used Rhotuka spinners with a disrupter power that drained energy from a target. They were extremely cautious fighters, preferring to wait until a foe was weakened by others before striking.
Roporak could only drain energy from living things, not mechanics.