On Mata Nui Midak lived in a hut outside of Onu-Koro as an Ussal farmer and once rented Takua an Ussal named Pewku. He travelled with Takua, Nuparu and Damek to Le-Koro to help it and assisted Damek in transforming some Lehvak armor into Boxors. He was also rebuilt at the Kini Nui into a stronger form. When the Rahkshi invaded Onu-Koro, Midak was evacuated from the village. He also helped construct boats for the return trip to Metru Nui.
Return to Metru Nui
Upon returning to Metru Nui Midak aided in the re-construction of the city until the Staff of Artakha did the rest. He was also present during the ceremony for Matoro.
Midak was very fond of light unlike most Onu-Matoran, which gave Pohatu the idea to name the Midak Skyblaster after him. He wore black armour and a Pakari while he was on Mata Nui, though it is unknown what Kanohi he wore on Metru Nui. Following the Bohrok-Kal attack, Midak was rebuilt into a stronger, taller form at the Kini Nui.