Kier was a Matoran of Tegen Nui who one day, when he was out in the forest with Shagatiku, found an old Toa Suva. He stuck his hand in it, which caused himself, Shagatiku, and four other Matoran to be transformed into Toa. The encountered Tiekess, who was one of the Matoran to become a Toa, and went from there to Po-Tegen. There, they found a Toa of Stone, Kustre, and continued on their way. They later found the other two Toa, a Toa of Ice and another of Sonics, who will be introduced later.