Hestu, as in the guy you give Korok seeds to. After I first met him and completed his quest, he’s no longer in that same spot. Where can I find him?
After Hestu leaves the location where you meet him, look for Hestu near the Riverside Stable north of Batrea Lake.
After you expand your inventory, Hestu tells you he needs to go home to his Grandpa in Korok Forest. If you talk to him again afterward, you can ask him how to get there:
On the way, he stops near Riverside Stable along the Hylia river. After you upgrade your inventory a few more times, he continues his journey.
Eventually, Hestu will make it to Korok Forest. To get there, follow the Hylia River north.