Cobal is one of the first Mogma that Link encounters in Eldin Volcano. He is later found nearby the Earth Temple, where Link overhears a conversation between Cobal and his treasure hunting partner, Ledd, about the broken key required to enter the temple.
His name is Cobal. He is a member of
As many Mogmas' names are derived from minerals, it is likely that Cobal comes from the element Cobalt.