Roak, was a fire matoran that was transformed by a shadow leech in final days of the battle against the great oppressors’, Makuta Teridax. after his defeat Roak wondered the now black desolate universe coming into contact with a Nui stone, which was a source of light for him. This contact thus freed him from the shadows plague him mind and transformed him into a new toa of fire, but with the mutations still intact. His unique circumstances allow him minor control over shadow giving his flames a purple appearance. Though he is a toa his appearance causes many to recoil and shun him on Bara Magna.
Comments critics welcome, may still build a weapon. Im so so on the legs.