His name is Tyto. He is a member of a highly civilized race of moles called the Mogma. All Mogmas have a deep and abiding love of treasure.
Tyto is a Mogma who Link encounters on his first visit to Eldin Volcano. He looks fairly similar to most Mogmas; carrying similar traits to those of the average Mogma, although he bears dark green hair. He is first seen being harassed by a small horde of Bokoblins. Link must defeat every last Bokoblin that is troubling Tyto in order to receive the Digging Mitts as a reward.