Koyin helps run the ranch found down the hill from the Hateno Ancient Tech Lab
The Sheep Rustlers
Koyin: Hey, you.
Koyin: What do YOU want? Oh, don't act so clueless. Although... fine. You seem harmless enough. Forgive me, I've just been on edge with all those monsters running around. They come up from Hateno Beach to steal my sheep. If someone doesn't do something soon, I won't have anything left!
Koyin: I hate that group of monsters on Hateno Beach...
Link: Which monsters?
Koyin: The stupid ones who attack anything that moves. Last time they showed up, I gave them a test of my pitchfork. But I had second thoughts about follow them back to their camp on Hateno Beach. I was mad enough to spit but maybe not mad enough to take on seven monsters at once.
Link: Hateno Beach?
Koyin: It's southeast of the village. Follow the winding road, and you'll be there before you know it. It's well-known enough that you can probably find it on a map, come to that. Anything else you want to know?
Koyin: Good... *sigh* good-bye. I'm sorry if we got off on the wrong foot. Uh... that's all.
Koyin: The sheep have calmed down. I think they get that they're not about to be snatched at any moment. Hey... Sorry, if I'm off the mark in asking this, but are you the one who took care of those monsters?
Link: That's right.
Koyin: I had a feeling. When the sheep calmed down, I thought, "Maybe he did it..." So it seems I owe you some thanks. This isn't much of a reward, but hey, it's light. That counts for something.