Prior to the Great Cataclysm, Kivi inhabited Po-Metru. He worked as a Chute Station Attentant at Chuste Station 445 and, at some point, aided Toa Onewa in his search for Ahkmou.
Kivi then stayed in Po-Metru until the island's Matoran population was taken away by the Vahki, who were being commanded by Makuta Teridax in the form of Turaga Dume. He was put into a Matoran Sphere.
Later, when the Toa Metru rescued all of the Matoran, he was reawakened on the shores of Naho Bay.
Due to the fact Kivi was in a Matoran Sphere, his size and strength was decreased. He also lost all of his memories.
In the first years of The Dark Time he worked with all of the other Po-Matoran on creating the village of Po-Koro. The village leader would be Turaga Onewa former Toa Metru of Stone. They made the village out of dismantled Airships.
Later in Kivi's life he became a Hewer and worked in Po-Koro. He worked here until the village was evacuated during a Tahnok attack. The Po-Matoran then fled to Ga-Koro, where they helped to defend the village against Pahrah.
After the Bohrok-Kal were defeated, Kivi and the other Matoran were rebuilt into larger, stronger forms like they had been before the effects of the Matoran Spheres.
Kivi then helped to construct the boats to return to Metru Nui, and also heard the Turaga tales about Mata Nui.
He and the other Matoran of Metru Nui then celebrated Mata Nui's awakening in the coliseum before they heard Teridax proclaming to have become the Great Spirit, and that now he ruled the Universe. The Matoran then scattered then separated to avoid being captured by Teridax. It is unknown what Kivi did until Teridax landed on Bara Magna
During Teridax's fight with Mata Nui on Bara Magna, the blows that Teridax recieved created various earthquakes, and these caused the majority of the Matoran Universe population to be evacuated in shleters. Thanks to this, after Teridax's head collided with Bota Magna, Kivi and many other Matoran and other beings were able to survive. As Teridax was killed by the impact, the Matoran Universe had three days before it ceased functioning, turning it into a world with no light, heat or air, and Kivi had to join the mass exodus to escape to the reformed Spherus Magna. He is currently residing there.