Koroks

Koroks are a species of characters in The Legend of Zelda: Breath of the Wild. Koroks are a race that are characterized by their short, stubby, green and brown wood-like bodies and faces covered in leaf-like masks. They are found all around Hyrule, where Link solves a variety of puzzles to find them and is rewarded with a Korok Seed, and in the Lost Woods, where they live.

Biography
The Koroks are scattered all around Hyrule, hiding. Link can find them after solving a small puzzle to reveal their hiding spot. The first time he finds a Korok, it remarks that it's surprised Link can see them. After finding a Korok, Link is rewarded with a Korok Seed, which can be traded with Hestu, a large Korok, for more inventory space for weapons. Despite being all over Hyrule, the Lost Woods is truly home to the Korok race, and many are found here. Most hide from Link upon seeing him, but some talk to him, and there is also a shop managed by a Korok in these woods. It is implied that most people cannot see Koroks, which is why they are surprised when Link can.

Trivia

 * Their name comes from Koropokkuru, small creatures that hide in plants in Japanese mythology.