Dezalk

Dezalk is a Ta-Matoran who served as the Piraka's test subject for their Zamor Spheres. Dezalk was the first slave for the Piraka. He gathered the Voya Nui Matoran together at Zaktan's command, where the Piraka proceeded to enslave the rest of the population (except for the resistance members, who were elsewhere).

It is presumed he was freed by the Toa Inika.