Lumber is a Suntot with fuchsia hair who works as a lumberjack. Although his only appearance is in Sounds Of Music, he plays a major role. In the episode, he helps Cool locate a tree so Chip can build a giant harp out of it.
Lumber talks in a slight Hispanic sounding accent and is prominently seen carrying his axe. However, he cuts only so much lumber for exactly what he or the others need, preserving the rest of the tree.