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Benjamin Kirby "Ben" Tennyson, also known as Ben 10, is the main protagonist of the Ben 10 franchise. 

He is the wielder the Omnitrix, a powerful watch-like device that allowed him to turn into ten different aliens.

In the AWA fics, Ben is a student at the AWA Academy.

In the XP4 fics, Ben debuted in the XP4 Heroes Coalition - Mission Chronicles.


Ben has a shaggy brown hair, green eyes, pale skin, and he's quite skinny for his age, though he shows a lot of muscle definition due to being athletic. Ben wears a black shirt that has a green stripe in the middle with a white 10 and green stripes on the sides of his shirt. He wears brown cargo pants with pockets at the knees and green and white shoes. He later gains a white hooded jacket with green stripes on both arms and a green number 10 on the right side. He wears the Omnitrix on his left wrist.


Initially cocky, childish and arrogant, Ben's immaturity and attention-seeking behavior often led him to joke around, regardless of the situation. His allies often criticized his attitude, unaware of the fact that he used humor to mask his fears. Despite some childish attitude, he was heroic, caring and generally good-natured, always willing to save others at any time.

Over the years, Ben has displayed good leadership skills, as well as the ability to adapt his attitude to a situation, becoming serious when it's called for. He became more mature, responsible and sensible. He's kind-hearted, willing to sacrifice even his own life for others. His idealistic views and unwillingness to compromise his values – aspects condemned by Azmuth, yet commended by others – sometimes drive him to act against reason, such as helping his enemies if they need it (most remarkably Vilgax). Professor Paradox has praised Ben's good nature, going so far as to say he had the gift to make the right choices at the right moments.

However, when Ben fails to save someone, or if someone gets hurt because of his failures, he becomes angry and much more violent. Perhaps the most notable of these instances is when Kevin willingly mutated himself to succeed where Ben had failed and stop Aggregor, Ben was set on killing Kevin, even fighting Gwen when she refused to help him. He also threatened to hunt down and destroy the Forever Knights once making Driscoll promise to cease the hunting of aliens.

Though often stated to be silly or unintelligent because of his immaturity, Ben is cunning and resourceful when needed, quickly adapting when the Omnitrix doesn't provide him with the alien he wanted.

Later on, Ben starts thinking of himself as more of a superhero than a Plumber, often remarking that he's not a cop, but a superhero. Although he once again became cocky, he retained his selfless and heroic nature.

XP4 Fanfics

Ben is a member of the Heroes Coalitions and works as a Solo Hero. He also attends the Vanguard Academy as a student.

XP4 Heroes Coalition - Mission Chronicles

In Chapter 2, Ben, alongside Gingka Hagane, Toadal Dude, Juniper Lee, Rook Blonko and Ashley Plutia Iris Heart, were tasked to disposed a bomb threat somewhere in the Undertown below Bellwood. They later encountered Fistrick who tried to flee but is caught by Toadal Dude. They later interrogated Fistrick whom kept his mouth shut until he succumbs when Ashley "interrogated'' him off-screen. They later then raided a hideout where they took out some goons, Daxuz then arrives and threatens to blow up the place but is stopped when Ashley attacked and tortured him off-screen, much to everyone's horror. After Daxuz is arrested by the Plumbers, they decided to hangout at Mr. Smoothie.

XP4 Heroes Coalition - Remnant Chronicles

In Chapter 11, Ben arrives in Mistral off-screen. Later, Ben, alongside the Death City Squad, Qrow Branwen, Nora Valkyrie, Jaune Arc, Lie Ren, Yang Xiao Long, Weiss Schnee, Oscar Pine and a number of heroes from the Heroes Coalitions, arrives in Haven Academy and confronted Leonardo Lionheart, Cinder Fall's group, Raven Branwen and Vernal. Then both sides got into a battle with Ben, transformed into Four Arms, taking on a number of Emotionless.


Ben has been trained in hand-to-hand combat by black belt Gwen, Max, as well as various years fighting aliens, and received a basic Plumber training. He proved to be quite skilled in basic hand-to-hand combat as well armed and unarmed combat, being able to easily dodge shots from Manny's blasters and proceed to disarm him while in human form. Ben was able to hold his own against Pierce, and Max hinted that Ben was a highly skilled fighter, even as a human. Another hint of his exceptional hand-to-hand skill is when he succeeded in the Plumbers' Academy with a 95 out of a 100. He is also a crafty fighter and actually uses freestyle fighting.

It's evident that Ben is smart in some respects, possessing an above average intelligence. It was even stated by Gwen that he really isn't working up to his potential at school. He also has fairly moderate grades. Physics and Chemistry are his toughest subjects, yet he still maintains a B+ average.

Ben has a good memory, as he was perfectly capable of remembering and writing down the mystic rune-like symbols for entering the inter-dimensional realm of Ledgerdomain with just one glance from a distance.[4]

Ben is also a cross dominant, skillfully wielding tools and weapons in either hand, in human or alien form.

Ben is the wielder of the Omnitrix (formerly the Ultimatrix and first Omnitrix), which gave him the power to modify his own genetic code in order to turn into various alien creatures. Traditionally, he could only transform into ten aliens at the beginning of both the original series and Alien Force, but he later gains additional forms by either unlocking them or by scanning the DNA of aliens he meets.

When transforming into an alien, Ben gets all the creature's features, including its appearance, voice, all of its unique and special abilities and powers, strengths and weaknesses. Though he mostly retains his personality, there are some cases where the transformation causes a change in it, like with Rath and Jury Rigg.

Though he usually uses his alien forms to fight, he can impersonate aliens as he did with Water Hazard to convince P'andor to go home, and though he was unsuccessful at convincing him, P'andor believed him to be Bivalvan.

In addition to transforming into aliens, the Ultimatrix included what is referred as an "evolutionary function", that allowed Ben to evolve his alien forms in order to get upgraded versions of them, referred to as Ultimate Forms.

In addition to the primary transformations and evolutionary function, the Omnitrixes and Ultimatrix can both be used for various purposes. Both have a built-in Universal Translator that allows Ben to communicate with most aliens that don't speak English.

The prototype Omnitrix displayed the ability to manipulate and repair genetic damage, a function he used to cure DNAliens and save the Highbreed from extinction. Azmuth also mentioned that Ben could use the prototype Omnitrix to bring back to life any species stored on Primus.

The Omnitrix also has a failsafe to help prevent Ben from dying. If Ben is in mortal danger and the Omnitrix is in recharge mode, it will automatically go into active mode.


  • Ben alongside Rook Blonko are the first characters from Ben 10 to be introduced in the AWA fics.
  • According to Azmuth and Professor Paradox, Ben will have a glorious future.
  • According to Azmuth and Sir George, Ben is the same as they were when they were young.
  • According to Natalie Tennyson, Ben does not have good table manners.
  • When Ben was 10, he used to sleep with his teddy bear, called "Furry Freddy." However, Ben defended himself saying that Furry Freddy had his own bed, which happened to be right next to his.
  • Ben's history now has to be read at the Plumbers' Academy. It comprises approximately a "chapter and a half."
  • Gwen's birthday is in December, which would put Ben's in December too, as they both share the same birthday.
  • According to himself,
    • He used to shout the names of his aliens to strike fear into his opponents.
    • His worst subject is Physics.
    • He passed the 3rd grade by choosing C for all the answers on multiple choice tests.
    • His favorite color is green.
    • His favorite food is Chili Fries.
    • His favorite hobby is collecting Sumo Slammers.
    • His worst fear is peacocks.
    • His first crush was Patty Berkinfield from 3rd grade.
    • He has a scar on his body in the shape of New Jersey.
  • Ben has a habit of referring to other members of his aliens' species by the names he gives his aliens.
  • Ben has obtained an honorary college degree from Friedkin University.
  • In the AWA fics, Rainbow Dash and Rarity Belle seems to have feelings for Ben but he seems more interested with the former.


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