Cobal

Cobal is a character from The Legend of Zelda: Skyward Sword. He is a Mogma living at Eldin Volcano.

Biography
Cobal is first encountered outside the Earth Temple, where Link overhears a conversation between Cobal and his partner, Ledd, about the broken key required to enter the Earth Temple. Once Link makes his way into the Earth Temple, Cobal explains that Ledd has gone ahead and, concerned, asks Link to look for him.

Etymology
As many Mogmas seem to be named after types of metals, it is possible that Cobal is derived from cobalt.