Akamu

Akamu was an Onu-Matoran.

Metru Nui
Nothing is known of Akamu's life on Metru Nui except that he lived in Onu-Metru and was taken away by Vahki and placed in a Matoran Pod. He was later awakened by the Toa Metru.

Mata Nui
When he was taken to Mata Nui, Akamu was a Crafter who invented the Sluice, a tool used for collecting Protodermis. He also made Pickaxes.

Return to Metru Nui
Akamu returned to Metru Nui and helped to rebuild it until the Staff of Artahka was used to repair the rest of the city.

Spherus Magna
He has since evacuated the Matoran Universe and is currently living on Spherus Magna.