Kokkan

Metru Nui
Kokkan was a Ko-Matoran. Long ago he lived on Metru Nui, but was captured into a Matoran Pod by the Vahki and taken away by the orders of Teridax who was disquised as Dume. The pod was rescued by the Toa Metru and brought to the island of Mata Nui where they awoke the Matoran, becoming Turaga. By time, Kokkan's memory was erased and his size decreased because of the effect of the pods.

Mata Nui
Kokkan suffered from the Rahi attacks and the Bohrok War. After the Bohrok-Kal's defeat, Kokkan was called to Kini-Nui with the other Matoran where he was shown the rebuilt Jaller and Takua. Then Kokkan himself was rebuilt along with the rest of the Matoran in a bigger form.

Kokkan was a Trader on Mata Nui, with an own shop. He sold Air Bladders, Bamboo Poles, Rigging, Nets, Rope and Sailcloth. He would also buy these things. He served Hahli briefly when she was traveling around to practice her Kolhii skills.

Return to Metru Nui
Kokkan returned to Metru Nui with the other Matoran after it was rediscovered by Takutanuva. Kokkan 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
He later evacuated the Matoran Universe and is currently on Spherus Magna.