Forest Giants are mighty creatures that inhabit some regions of the island, usually far away from the spawn locations and anything near them. Before attacking the player they are neutral, and appear like a cocoon type structure that looks like its made up of roots and flesh, which makes it easily set apart from the environment. As soon as the player gets close to it, the Forest Giant awakens and starts attacking the player. Average speed (lower than the player's) and makes the ground tremble as it walks.
They will chase you for a very long time if angered, possibly forever.