Although an aging human, Nebula is well-built, with a broad chest and shoulders. He is dark-skinned, has a large chin, and possesses a gray mustache, complete with gray eyebrows and hair. His mustache occasionally mirrors his mood by curling or prickling whenever he is agitated. His left leg was cut off at the knee at some unknown point, and has been replaced by a peg leg which doubles as a plasma cannon.