Kantai

Kantai was a Ko-Matoran.

Metru Nui
Barely anything is known of Kantai's life in Metru Nui. All that is known is that he was put into a Matoran sphere along with all the other Metru Nui Matoran and later rescued by the Toa Metru during the Great Cataclysm.

Mata Nui
He was brought to Mata Nui by the Toa Metru Nui and awakened. Kantai lived near the ice flows in a small cave on Mata Nui in Ko-Wahi. He was rebuilt at the Kini Nui following the Bohrok Kal's attack. He knew the Principle of Willpower and taught it to any that would ask. He later aided in the construction of boats for the return trip to Metru Nui.

Return to Metru Nui
Kantai returned to Metru Nui and helped to rebuild it until the Staff of Artakha was used to repair the rest of the city. He was also present during the ceremony for Matoro.

Spherus Magna
Sometime later he evacuated the Matoran Universe and is currently living on Spherus Magna.