Vital statistics
Name Alpha
Species Nanite-being
Physical description
Eye color White
Abilities  ·Technopathy
 ·Nanite absorption
 ·Enhanced strength
 ·Energy creation
Weapons Energy fists
Duplicated Ultimatrix
Relatives Caesar Salazar ("father"/creator)
Enemies Rex Salazar, Ben Tennyson, Agent Six, Rebecca Holiday, White Knight, Caesar Salazar
Further info
First appearance "Ben 10/Generator Rex: Heroes United" (only appearance)
Portrayed by: Michael Emerson
Images | Quotes
I was misguided to place my trust in a father that did not want me. I never needed him. I simply needed the energy and means to do what I have always done: evolve.

–Alpha after absorbing Rex's Omega-1 Nanite to become Alpha-Omega, "Ben 10/Generator Rex: Heroes United"

Alpha is a sentient nanite created by Caesar Salazar during the Nanite Project. It was cast off to another dimension when it was found he was attempting to control living beings. Eventually it escaped, but was later recaptured by Rex Salazar and Ben Tennyson and sent back to the Null Void.



Alpha was created by Caesar to control other nanites as a sentient being, but its energy/nanite body was unsustainable. Alpha tried to make mechanical bodies to sustain itself and that failed so instead it tried to use living organic bodies as hosts.

Therefore, Alpha was sent to a parallel dimension, the Null Void, by Caesar, who mistakenly thought he had sent the nanite to an empty pocket dimension when in fact it was a prison for alien criminals.[1]


Having escaped from the Null Void, Alpha returned to Earth to find its "father", hoping he would help it obtain a stable and lasting physical form. Using a robotic body as a host, Alpha entered Rex's universe through a dimensional rift, unintentionally bringing with him Ben Tennyson. Alpha's attempt to follow Caesar was interrupted by Six, who fought him. Eventually, Six stabbed the robotic body with his magna-blades causing an explosion which ejected Alpha from the robotic body and left Six in a coma.

Alpha caesar rex - heroes united

Alpha meets his "father" again.

Later, Alpha returned as its normal form—an energy figure shaped as a human. Caesar came to send it back to the Null Void, but was blocked by Ben Tennyson, who thought Caesar was attacking Ben and Rex. Alpha asked for Caesar's help, but Caesar refused. Caesar took Ben and Rex in his mobile lab and explained what Alpha was and how he was trying to return him to the Null Void, but when Alpha attacked the lab Caesar exited alone in an escape pod, leaving Ben and Rex in the exploding remains of the lab to face Alpha. However, they escaped by Ben saving Rex using Cannonbolt.

Alpha then attacked the Petting Zoo at The Plant, where he intended to absorb more nanites. He was attacked by Dr. Holiday, Rex, and Ben, where he escaped, not being strong enough to take them all on, but not before learning that Rex's body sheltered an Omega-1 Nanite.

Eventually, Alpha was located at the Bug Jar, where Rex, Ben, and White Knight went to go stop him. They quickly discovered that Alpha had absorbed the entire nanite population, growing into a 20-foot tall beast that was set on absorbing Rex's Omega Nanite. Eventually, it even hacked Ben's Ultimatrix due to the nanites it absorbed upon his arrival. It created its own Ultimatrix and transformed into EVO-like versions of several of Ben's forms, specifically Heatblast, Fourarms, and Humongousaur.

Alpha 4

Alpha as "Alpha-Omega".

Rex absorbed all the nanites Alpha used to make his Ultimatrix, but wasn't strong enough to stop Alpha from taking his Omega-1 nanite. Alpha evolved into a 100-foot tall form with crab-like legs and called itself "Alpha-Omega". He then proceeded to destroy the city, but was ambushed by Rex and Ben when they merged together using Upgrade, greatly enhancing Rex's abilities. Eventually, Rex used Ben as Cannonbolt to attack the protected Omega nanite, and he was morphed into a nanite-cloud form.

Heroes United Sphere

Alpha breaking free from his nanite sphere.

Rex then absorbed all the nanites Alpha had taken from the inhabitants in the Bug Jar and reduced Alpha to a small nanite sphere made out of dense matter which would have been difficult to escape from. Caesar then appeared and opened another dimensional rift to the Null Void. Ben transformed into Upchuck and swallowed up the Alpha sphere and left for his universe. Alpha is last seen in the Null Void, breaking out of his sphere.[1]


Alpha's deepest wish is to have its own body, and it will go to great lengths to accomplish these goals. Going so far as to kill living beings, after its own attempts to create a host robotic body failed. It has no moral objections with murder or destruction, as long as it benefits it in some way. However, it prefers to solve things diplomatically, and will only kill those whom it feels it must kill, showing little interest in anything else.

Despite being a machine, Alpha shows a surprisingly human emotional side, showing more emotion with its "father". Alpha seems to envy humans and wants a family of its own, going so far as to claim Caesar as its "father" and every nanite as its "brothers." Alpha seems to want its father's love and respect, and was visibly saddened when Caesar refused to help it, but later accepted that its "father" did not want to claim it.

Alpha is also very intelligent and scientific. It showed a curious side by scientifically analyzing and adapting Rex's unique nanites and Ben Tennyson's Ultimatrix. While Alpha does seem fascinated by and envious of humans, it also believes that machines are superior in many ways and absorbs machines into its own body to further its own goals.


Alpha 7

Alpha attempts to absorb the Omega-1 Nanite.

Like Rex, Alpha has the power to manipulate nanites, as well as the ability to use them to control other machinery. Similar to Van Kleiss, Alpha needs to drain other beings of their nanites to sustain himself. However, unlike Van Kleiss where the drained target becomes petrified, the creatures absorbed by Alpha turn to dust.

Alpha is an extremely powerful opponent, able to withstand extremely powerful attacks from both Rex and Ben. After gaining the Omega-1 Nanite and evolving into a more powerful form, it was able to eventually defuse their combined form. It has also been shown to be extremely resilient, surviving being compacted into an extremely dense and heavy sphere from a multi-space rift and eventually beginning to free itself from it.

Technological abilities

  • Technopathy: Alpha has the ability to take possession of other machinery, as well as living beings filled with nanites, by using its own. There is a flaw with Alpha's manipulation: any machine Alpha takes possession of will "burn out" some time after he takes possession of them; living beings are reduced to ashes. It can create large, stretchable fists with his nanites, similar to Rex's Smack Hands.[1]
  • Omega-1 Nanite: Upon siphoning away Rex's Omega-1 Nanite, Alpha gained the ability to replicate an unlimited amount of nanites. It also granted Alpha a larger, more powerful form known as "Alpha-Omega".[1]
  • Duplicate Ultimatrix: Alpha also has the ability to hack and mimic even the most advanced of technologies -- the Ultimatrix -- and make use of its transformative capabilities to take on a more demonic form of the extraterrestrial aliens used by the hero Ben Tennyson, demonstrating this by transforming into Heatblast, Four Arms, and Humungousaur.[1]

Alien/EVO forms

Alpha Heatblast Alpha Heatblast
Alpha Heatblast is a Pyronite EVO, an alien capable of controlling fire and heat. He is large and muscular with fire tentacles, a tail and two flames in his shoulders. His Ultimatrix symbol is red.
Alpha Four Arms Alpha Four Arms vs. Rex
Alpha Four Arms is a large and muscular Tetramand EVO with superhuman strength and four arms. He has long black hair and black pants. He has red lines on his chest and arms, and his eyes and the Ultimatrix symbol are red.
Alpha Humungosaur Alpha Humungousaur
Alpha Humungosaur is a Vaxasaurian EVO, a large green dinosaur-like creature with superhuman strength. He has green skin and grey spikes on his head, arms and tail and has red lines on his chest. His eyes and the Ultimatrix symbol are red.
Alpha Alien Robot Heroes United Alpha Robot
This form of Alpha Nanite was acquired in the Null Void. It must therefore be that of an alien species previously destroyed by Alpha. As stated by Alpha he cannot find a self-staining body to contain his form, so eventually this form was destroyed by Agent Six.


Season Three


  • The creators stated that the character would be voiced by "an exciting and surprising voice actor". This person turned out to be Michael Emerson, who is known for his role in the TV show Lost and his role as red herring Zep Hindle in the 2004 horror film Saw.
  • The term "Alpha and Omega" means "The first and the last" and "The beginning and end".
    • Alpha is the first letter in the Greek alphabet, while Omega is the last.
  • Alpha calls all nanites his "brothers".
  • Alpha is the precursor to Zag RS, another sentient nanite invention of Caesar's.
  • Alpha is the only one that was able to absorb the Omega-1 Nanite.

External links

  • Alpha page on Ben 10 Wiki.


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