Before the Great Cataclysm, Keahi lived and worked in the region of Ta-Metru. When the Matoran were taken away by the Vahki Keahi was also taken. The Vahki were being commanded by Teridax who was in the form of Turaga Dume. He was put in a Matoran Sphere. Later, when the Toa Metru rescued all of the Matoran, he was reawakened on the shores of Naho Bay.
Because Keahi 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 Ta-Matoran on creating the village of Ta-Koro. The village leader would be Turaga Vakama former Toa Metru of Fire. They made the village out of dismantled Airships.
After the Bohrok-Kal were defeated Keahi and the other Matoran were rebuilt into larger, stronger forms like they had been before the effects of the Matoran Spheres. He taught Hahli how to increase her strength by kicking Kohlii balls at large stone columns.
When the Rahkshi attacked Ta-Koro and destroyed it Keahi and the other Matoran had to leave.
The Return to Metru Nui
Keahi and the other Matoran built the Boats so the Matoran could return to Metru Nui.
When the Toa Nuva eventually got back to Metru Nui they celebrated Mata Nui's awaking. But Teridax revealed he was in Mata Nui's body and he had control over the Matoran Universe. The Matoran then scattered then separated to avoid being captured by Teridax. It is unknown what Jaa 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, Jaa 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 Jaa had to join the mass exodus to escape to the reformed Spherus Magna. He is currently residing there.
- Mata Nui Online Game II: The Final Chronicle
Ta-Matoran: Aft • Agni • Aodhan • Balta • Brander • Dezalk • Kapura • Kalama • Keahi • Maglya • Nuhrii • Tiribomba • Vohon