Sidorak

Sidorak was the king of the Visorak hordes and an enemy of the Toa Hordika.

History
Sidorak was once a minor power on his war-torn home island, but quickly rose through the ranks by taking credit for the victories of those under his command (if any underling objected, he would have them disposed of). He was also involved in his share of betrayals, he once betrayed one of the island's clan leaders to the Brotherhood of Makuta, who then transformed the leader into the mutant Voporak.

At one point six thousand years prior to the Great Cataclysm, Sidorak was considered for recruitment into the Dark Hunters. His lack of fighting skill, however, led him to be easily defeated in a training exercise, so his membership was denied. But he was still seen as useful to the Hunters and therefore allowed to live.

His talent for treachery caught the eye of the Brotherhood, and Sidorak was made a lieutenant of theirs alongside Roodaka. He saw that Roodaka would make a valuable ally, and suggested an alliance with her; she rejected the idea. Instead, the two often competed for the Brotherhood's favor.

When the Brotherhood's bodyguards, the Toa Hagah, discovered the group's corruption, they rebelled. However, Roodaka caught them and mutated them into small, Rahkshi-faced creatures she called Rahaga. Sidorak took the credit for this idea, and was therefore appointed King of the Brotherhood's Visorak hordes, while Roodaka was given second-in-command.

In their time as the Visorak's leaders, Sidorak still pursued a formal alliance with Roodaka, specifically, he repeatedly asked her to marry him. In the Bionicle world, "marriage" is purely a political alliance: such a union would give Sidorak valuable influence with Roodaka's race, and Roodaka would become a full-fledged Queen of the Visorak and gain some of the power that she desires. However, she would always reject his advances.

As King, Sidorak preferred to personally lead his troops on the battlefield; and gave all appearances of being confident and in control. However, some of this may be compensating for the fact that he knew that he had not earned his position, but rather gained it by backstabbing. While he might have been insecure about his leadership, he was absoulutely confident in his manipulation skills and did not believe that he could be outmanipulated by anyone.

After Makuta was imprisoned during the Great Cataclysm, he telepathically summoned his servants to rescue him, and Sidorak led the hordes to the city of Metru Nui to do so and gain his favor. His leadership led the Visorak to quickly take over the city, hunting down and capturing any creature that they found.

When the Toa Metru returned to the city, they were quickly captured as well. At first Sidorak just wanted them killed immediately, but Roodaka convinced him that "worthy enemies of a great king" should have more spectacular deaths. But the Rahaga inturrupted the execution and saved the Toa's lives, though not before they were mutated into beastly Toa Hordika. From then on, the Toa Hordika would be a constant thorn in Sidorak's side as he tried to exert more control over Metru Nui.

Sidorak met his end in the final battle for Metru Nui. During a battle with Keetongu, he went to finish off the wounded Rahi, only to find that Keetongu was not wounded, but angered. Realizing that he cannot win against a furious Rahi, he told Roodaka to help him, but she refused. Sidorak realized that she angered Keetongu on purpose; Keetongu would kill him and Roodaka would be the Visorak's Queen without having to share the power with anyone. Acknowledging that he had been outwitted, he did nothing to stop the fatal blow.