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 His left leg was cut off at the knee at some unknown point, and has been replaced by a peg leg which doubles as a plasma cannon.
Sometime in the past, possibly before Nebula became the Commander, he assumed the role of undercover bounty hunter Shiv Katall, and smuggled defecting minions from the Evil Emperor Zurg into the Galactic Alliance. However, he later passed on the role to Buzz Lightyear, though whether it was due to old age or the loss of his leg is unclear.
Loud, hard-headed and somewhat abrasive, Nebula is known for his gravelly voice and hatred of all things bureaucratic, including paperwork.
He is an excellent commander, as he never orders his Rangers into a situation he would not go into himself. He is not known for tolerance toward insubordination, though he has the grace to admit when he's made a bad call.
His peg leg doubles as a plasma cannon.
- "I'm not your dad. You were built by the LGMs! For Pete's sake, I only signed the work order!"
- "Huh. Those invention reviews are more borin' than watchin' constellations form."
- "Fantastic. Another paper clip requisition form."
- According to Crumford Lorak, Commander Nebula's left leg was taken out by Shiv Katall. However, because Shiv Katall was originally Nebula in disguise, and because Crumford Lorak is sometimes not the most reliable source of information, this is not likely to be true.