Peeks is one of the Koroks found in the Forest.
Legendary Rabbit Trial
Peeks: It's...it's...it's... IT'S MR. HERO! YAAAAAAAAY! Mr. Hero came to visit us in the forest! What took you so long?! Peeks thought of a trial that will make Mr. Hero stronger! You won't have to fight, and it's not scary! BUT you'll need to be extra careful! So... I wanna see a Blupee! It's a blue, glowy, hoppy thing that glows in the dark! Just about Peeks's size! I just really want to see a Blupee! Even if it's just a picture of one.
Link: I'll help you out.
Peeks: So...I don't know where they live, but I heard there are little blue glowing critters hopping around Hyrule. Apparently they're called Blupees! I wonder how glowy they are! Aren't you curious? If you show me a Blupees, I'll be sure to thank you with a gift! Good luck!
Peeks: Oh! Mr. Hero! Did you bring it for me?
Peeks: W-w-wait a minute! Is that a real Blupee?! Wow! It's even more beautiful than Peeks imagined! Thanks so much, Mr. Hero! Now I'm content! ...Oh! And here's a little thank-you gift! Peeks didn't forget!
Peeks: HUH?! Wait, wait?! You have it already?!
Peeks: Wow! It's even more beautiful than Peeks imagined! Thanks so much, Mr. Hero! Now I'm content! ...Oh! And here's a little thank-you gift! Peeks didn't forget! Oh, yeah! Mr. Hero needs rupees sometimes, right? If you desperately need rupees....you should shoot an arrow at a blupee! I hear they drop lots of rupees if you hit them. Oh, man! I'm so glad I got to see something so cool! Peeks is so happy right now!