On Metru Nui, Kantai lived and worked in Ko-Metru.
He was captured by Vahki under the command of Makuta Teridax disguised as Turaga Dume. He was then placed into a Matoran Sphere and went into stasis, but was later rescued by the Toa Metru and reawakened on the shores of Naho Bay on the island of Mata Nui.
Kantai lost his memories of Metru Nui and was reduced in size and physical strength as a result of his being confined in a Matoran Sphere. He helped in the construction of Ko-Koro under Turaga Nuju's guidance, using pieces from Airships brought to Mata Nui in the Great Rescue.
On Mata Nui, Kantai became a Hermit and lived in The Drifts, near the Ice Floe in a small cave there. He was well-versed in the Kolhii Skill of Willpower and taught it to any who asked. In the peaceful time after the defeat of the Bohrok-Kal, Kantai was rebuilt into a stronger form, alongside the other Matoran.
He later foresaw the Ga-Matoran Hahli's coming and taught her Willpower by having her balance on the Ice Pole. Kantai was evacuated from Ko-Koro with the other Ko-Matoran following the Rahkshi's attack on the village.
Return to Metru NuiEdit
Kantai later helped in the construction of Boats to facilitate his, and the other Matoran's return to Metru Nui. Once they had reached, the Matoran, including Kantai, worked on the city's reconstruction, until the usage of the Staff of Artakha restored Metru Nui to its' former glory.