Votanu was a Toa of Lightning who fought in the Toa-Dark Hunter War. She was a genius tactician, and was part of Lhikan's central council. She also suspected Nidhiki's treachery. When she found proof of his wrong-doings, she confronted him. Unfortunately, Nidhiki proved to be too much for the Vo-Toa, and he stabbed her through the chest. Thinking his opponent dead, Nidhiki threw her into the sea to dispose of the evidence. For weeks she drifted through the endless seas of Protodermis, constantly beset by Rahi, until what washed up on Destral was barely alive.
The Shadowed one's scientists were unable to repair her original form, but constructed a new body for her. In the process, she lost most of her elemental powers. While she can no longer generate electricity, she can redirect existing energy. Her loss of power is further made up for by her weapons of choice, twin "Piraka" blasters.