Tahu is the main protagonist of the BIONICLE series. He is a Toa of Fire and the leader of the Toa Mata, the team of Toa, whose goal is to defeat Makuta Teridax and reawaken the Great Spirit Mata Nui. Due to his transformations of his many forms throughout the story, he eventually become the most powerful Toa in existance.
- Full Name: Tahu
- Alias: Toa Tahu, Toa of Fire, Spirit of Fire, Tahu Nuva, Master of Fire, Uniter of Fire
- Origin: BIONICLE
- Age: Unknown
- Occupation: Leader of the Toa Mata
- Powers/Skills: Fire power, Great Hau (formerly), Fire Sword, Hau Nuva, Magma Swords, Rotating Fire Blades, Nynrah Ghost Blaster, Golden Armor (formerly), Mask of Fire (formerly), Golden Mask of Fire (formerly), Fire Blades (formerly), Unity Mask of Fire, Elemental Fire Blades (formerly)
- Hobby: Lava surfing, interacting with his friends, hanging out with the other Toa Mata
- Alignment: Lawful Good
- Goals: Reawaken Mata Nui, defeat Makuta Teridax and the Brotherhood of Makuta, stop the Bohrok invasion, save the universe, find Ekimu and the Mask of Creation, find the Mask of Control, defeat Umarak
- Types: The Hero, Elemental
- Allies: Mata Nui, Gali, Lewa, Pohatu, Onua, Kopaka, Takua/Takanuva, Vakama, Nokama, Matau, Onewa, Whenua, Nuju, Jaller, Hahli, Kongu, Hewkii, Nuparu, Nuju, Artakha, Tanma, Photok, Solek, Toa Ignika, Gresh, Berix, Ackar, Kiina, Ekimu, Narmoto, Takadox (currently), Ikir, Akida, Uxar, Ketar, Terak, Melum, Agil, Furno, Stormer, Rocka, Evo, Breez, Surge, Bulk
- Enemies: Makuta Teridax, Bohrok (formerly), Bahrag (formerly), Rahkshi, Turahk, Kurahk, Vorahk, Lerahk, Guurahk, Panrahk, Zaktan, Hakann, Avak, Reidak, Vezok, Thok, Brutaka, Antroz, Vamprah, Chirox, Kirop (formerly), Gavla (formerly), Radiak (formerly), Krika, Gorast, Bitil, Mutran, Skrall, Tuma, Nektann, Rahkshi of Heat Vision, The Shadowed One, Dark Hunters, Skull Spiders, Lord of Skull Spiders, Takadox (formerly), Kulta, Skull Spiders, Skull Slicer, Skull Basher, Pridak, Ehlek, Carapar, Umarak, Shadow Traps, Shadow Spawn, Lava Beast, Quake Beast, Storm Beast, Axato, Makuta the Mask Hoarder, Ultrahex, Xplode,
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