This is Roplas, a Plasma Matoran who was once part of the Brotherhood of Matuka, but eventually abandoned them to join the Toa, Glatorian, Matoran, Agori, and other "good" people of Spherus Magna. The Makuta invaded Roplas' village, Plamocis, one day and captured the best warriors, him and Rotangor. They then mutated Rotangor into what he is now and gave Roplas and Rotangor the mission of hunting Toa. A few years into the job, they abandoned them to find the Toa. Roplas was part of many key events, like the destroying of the Kanohi Mask of the Dead. After destroying Makuta and the evil beings on Spherus Magna, Roplas has returned to his village, but he still keeps in touch with the Toa. He can control plasma and is armed with a bow and arrow that is coated in Ta-Nakan venom, which stuns the target for an hour. The bow can also separate into two blades.