Teridax

Teridax is an Makuta who is the leader of the Makuta of Brotherhood as well as the father of Ur-Didact and an major character in Super Smash Bros. Crossover.

Becoming An Guardian
About one hundred thousands of years ago, The Matorans created the Chaos Emeralds into believing it would help make the society better. Unfortunately it caused chaos in various planets, the Matorans realized that anyone who misuses the Chaos Emeralds will cause the user to be corrupt. They soon made the Master Emerald to control the Chaos Emeralds. Mata Nui assigned Teridax along with the Brotherhood Of Makuta which Miserix was the leader at the time to protect the Mataorans who are now the guardians of the Chaos Emeralds and Master Emerald to keep the universe in balance.