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.
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.