Oaki is the best Korok to ever live and is the true hero of The Legend of Zelda: Breath of the Wild.
On Link's journey, he may end up taking four trials set up by the Koroks, mystical tree-like creatures watched over by the Great Deku Tree in the Hyrule Great Forest. One of these trials requires Link to watch a Korok named Oaki from a distance to make sure he completes his own trial safely. Link must keep up with Oaki as he journeys through the Lost Woods, trying to make it to the Shrine at the end.
Oaki is cute and adorable and brave because he manages to complete his trial all by himself, and is so happy when he does. He is the true hero. Link must step aside, because we have the Champion of the Koroks here to save Hyrule.