Kai

Kai was a Ga-Matoran.

Metru Nui
She was summoned to the Coliseum with the rest of the Matoran of Metru Nui, where she was forced into a Matoran Pod. She, as the other Matoran, were saved by the Toa Metru, who gave up their Toa Power on Mata Nui to awake them. Kai awoke along with the others. She later shrank, became weaker, and forgot all about Metru Nui because of an effect of the spheres.

Mata Nui
Kai was a Sailor in Ga-Koro, where she helped Hahli in delivers of Flax. She made String and Rope and visited Marka often, to give her supplies. She was later rebuilt into a stronger form at the Kini Nui. She late also helped in the construction of boats to return to the city of Metru Nui.

Return to Metru Nui
She has since returned to Metru Nui, where she helped to rebuild Metru Nui until the Staff of Artahka was used to repair the rest the city. She also went into a ceremony in the Coliseum with the other Matoran, which was held in honor of Matoro.

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