Tahu was the Toa Mata of Fire, who once resided on Mata Nui during his time as a protector of the island and later became a Toa Nuva after his exposure to Energized Protodermis. The cunning and sometimes hot-headed leader of a group of Toa, Tahu brought his team through many battles against Teridax and his fearsome legions of Rahkshi and Bohrok, protecting their world from whatever threats came their way.
In their final mission, Tahu and the Toa Nuva journeyed to Karda Nui, where they fought against a group of Makuta. After narrowly escaping death by an Energy Storm, the Toa Nuva returned to Metru Nui, having seemingly fulfilled their mission. Yet upon Mata Nui's reawakening, Teridax had slipped into his body and gained complete control over their universe.
Now in possession of the Matoran Universe Robot, Teridax went to Bara Magna, where he confronted Mata Nui in an effort to destroy him and the entire planet. In the midst of the battle, Tahu emerged onto the planet alongside many of his allies. Upon his arrival, the Kanohi Ignika transformed him into a weaker Toa Mata form, for this was necessary in order for Tahu to don the Golden Armor and destroy Teridax's growing army of Heat-Vision Rahkshi.
Following Teridax's death and Mata Nui's return to the Ignika, Tahu declared that the races of the Matoran Universe shall begin a new era on Spherus Magna.
