Korvau

"I just pray that when I meet my demise, I am wearing my mask, donning my cloak, and carrying my dagger. Until then...the cycle will continue…"

- Korvau, The Book of Metru Nui (Three Simple Tools) Korvau, also known as the Metru Slasher, was a student at a Ga-Metru school and an infamous serial killer

Early Life
Korvau began his life like most other Matoran, working on the Matoran Universe on Spherus Magna. He helped with the construction, having no true desires or consciousness. He was placed in Metru Nui, along with many other Matoran. Due to tampering by Velika, Korvau gained true consciousness, and became self-aware. It was here where a defect in Korvau surfaced. He felt no remorse in any actions he committed. He began killing simple pet rahi, but was not satisfied. Korvau was able to become a student at one of the many schools in Ga-Metru.

First Murders
After a short time in Ga-Metru, Korvau had the overwhelming desire to commit full on murder. He went to Ta-Metru to get a mask to hide his identity for his murders, and also bought a knife there as well. He returned to Ga-Metru and after planning out his first murder, he carried it out next night, on one of the Ga-Matoran in his class. During the murder, Korvau felt an intense rush of adrenaline and joy. This one murder turned into an obsession, which sent Korvau down a dark path.

Active Period
After his first murder, Korvau became more and more active with each murder. Makuta Teridax, disguised as Turaga Duma, worrying that Korvau may cause massive upset amongst the Matoran, sent large amounts of Vahki looking for him, while keeping the murders under wraps to prevent paranoia and worry from spreading across the Metru's. The Vahki were unable to locate him, as he was too elusive. This allowed Korvau to keep committing his murders and still learn at the school without much worry. Korvau's murders got more and more brutal and violent, as he tried out new techniques on his victims. By this point, Korvau had killed about 34 Matoran.

Great Cataclysm
Korvau's kill count grew, and it was hard for Dume to keep his actions under the radar. Fortunately, Dume was just about to gather all the Matoran in the Coliseum. Korvau was the only Matoran who did not go to the Coliseum, as he intended to leave Metru Nui in a few days. When the Matoran Universe crashed into Aqua Magna, Metru Nui suffered massive damage, and Korvau hurried his plans and left Metru Nui. It is unknown where he went.

Abilities and Traits
Korvau was sadistic and a sociopath. He enjoyed harming living things, and eventually obsessed over it. He was also highly intelligent, allowing him to stay in his classes, all the while committing murders. He could cover up a murder very easily, and because of his elusiveness, he'd always be two steps ahead of anyone trying to catch him. Due to him being a Ko-Matoran, he had limited power over ice and a resistance to the cold.

Appearances
The Book of Metru Nui (first appearance)