Great Deku Tree



Guardian of the Kokiri and of their forest, the Great Deku Tree has been around since the beginning of Hyrule. He protects the Kokiri Emerald, one of the three Spiritual Stones.

The Great Deku Tree was cursed by Ganondorf in OoT, and embarked Link on a quest to save Hyrule. He died shortly after telling Link to go save Princess Zelda. When he died, a seed fell from one of his higher branches to the ground. As an adult, Link goes back to find a new Deku Tree Sprout growing in front of the old.



The Deku Tree Sprout later grew up to be the God of the Earth, the Great Deku Tree, who turned the Kokiri into the Koroks at the time of the Great Flood, and who helped Link, the Hero of the Wind, immensly in his quest.

One thing that set the Great Deku Tree of the Great Sea apart from his predecessor was that each year, the Great Deku Tree would send off some of the Koroks to plant trees all throughout the islands. This was done in the hope that, as the trees grew, they would absorb the sea water, allowing more land to surface as the sea retreated.

Manga
In the manga version, there is another talking tree known as the Baga Tree. He lives in the Lost Woods and has never beaten the Great Deku Tree once. The rumor that if you get lost in the woods, you turn into a stalkid is true, that's what the Baga Tree does to them.