Turahk

Turahk was one of the six Rahkshi released by the Makuta in an a temp to stop the approach of the seventh Toa. Turahk is the Rahkshi of fear and seemed to be their secondary leader next to Makuta.

BIONICLE Mask of Light: The Movie
Turahk was released by the Makuta Teridax after the first three Rahkshi, Panrahk, Lerahk, and Guurahk where frozen by Toa Kopaka.