Bohrok

The Bohrok are the main antagonists that were first introduced in the 2002 storyline of the BIONICLE series. They are the insectoid mechaloids whose main goal was to clean all the matters from the island of Mata Nui to ensure that the Great Spirit will rise again. They are also led by the queens of the swarm, Bahrag.

Although they are neutral, the reason of them became the villains at first is due of being awoken by Makuta Teridax, who provoked them into attacking the Toa Mata, Matoran and Turaga in the island. It was until the swarm were defeated following the Bahrag's defeats at the hands of the Toa Mata. Later, they are reawakened once more when the Toa Mata, who had became Toa Nuva, freed the Bahrag and they resumed their original goal as well as assisting the heroes on defeating the Brotherhood of Makuta and their army.

History
Prior of the major events of the series, the Bohrok were created by the Great Beings as their sole purpose was to clear the island of Mata Nui's environment to prepare for the Great Spirit's departure.