Onua is a character from the popular LEGO franchise known as Bionicle. He is a member of the Toa, a group of heroes tasked with protecting the island of Mata Nui. Onua is known for his strength and connection to the earth, often using his powers to manipulate soil and rock. In the lore of Bionicle, Onua represents the element of earth and is characterized by his black and brown color scheme. He wields a powerful weapon called the Mata Nui Sword, which allows him to channel his elemental abilities effectively in battles against various foes.