Keelerak

Keelerak are green Visorak with red eyes and lime legs. They are incredibly unpredictable, fighting one moment, disappearing the next. Keelerak have incredibly powerful Rhotuka, able to dissolve through almost anything with a powerful acid. Their feet are also razor sharp, and they are able to leap into the air and spin about, like gigantic buzzsaws. Keelerak once tried to rebel, and in return got hit by Sidorak's Obedience spinners. They are Main Characters in "Bionicle 3: Web of Shadows" and are shown to now be extremely loyal to Sidorak, so obviously the Rhotuka worked.