Characters: Ben 10 Supporting Characters

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    Julie Yamamoto 

Julie Yamamoto

Voiced by Vyvan Pham

Ben's Love Interest introduced in Ben 10: Alien Force. Julie was originally a girl Ben met following one of his soccer matches. The two developed a quick interest in each other, but Ben started hesitating to make any approach, afraid she might reject him if she found out about the Omnitrix. When this eventually happened during their first date, Julie turned out to not be scared of him, and they ended up in a relationship. Though non-powered at first, Julie can rely on the support of Ship, an galvanic mechamorph pet she met and tamed after her first date with Ben, to assist her in fights.

    Ship 

Ship

"Ship Ship !"
Voiced by Vyvan Pham

A small, dog-smart Galvanic Mecamorph (Upgrade's species) generated by Baz-L when he accidentally crashed on Earth. Ship was intended to find a Plumber and bring him for help; unfortunately, it mistook Ben's Omnitrix for a Plumber's badge, and, since it was unable to speak, had to try to get Ben's attention by attacking him and wrecking his date with Julie. Eventually, it succeeded in leading them to the ship, and they saved Baz-L in time. While he was leaving, Baz-L decided to leave Ship with them. It then developed a bond with Julie, effectively becoming her pet and main mean to fight.

    The Plumbers Helpers 

The Plumber's Helpers/Amalgam Kids

from left to right: Helen, Manny, Pierce and Alan

A group of alien Half-Human Hybrids Kids assembled during Alien Force to face the Highbreeds.

  • A Day in the Limelight: They are the main characters of "Above and Beyond".
  • Fake Memories: The Rooters implanted these in their heads, making them believe that they were born hybrids and had human and alien parents.
  • Five-Man Band:
    • The Leader: Pierce - The most logical member who holds the rest of the team together.
    • The Lancer: Alan - Had a distinct contrast with the rest of his team, and served as an outcast early on due to being the newest member.
    • The Chick: Helen - She is the only female, and is the kindest, most compassionate member, serving as the Team Mom. She at times doubles as The Lancer.
    • The Big Guy: Manny - Physically the strongest member, and loves to act before thinking.
    • The Smart Guy: Cooper - Being a Techno Wizard, he is one of the smartest characters on the show.
  • Half-Human Hybrid: They were originally thought to be half-humans. Though Omniverse retcons them into being regular humans who were infused with alien DNA, rather than being born hybrids.
  • Human Mom Nonhuman Dad: Inverted for Manny. His mother was a Tetramand, and his father is human. Retconned in Omniverse. He, like all of the others, was born human.
  • Monochromatic Eyes: Everyone except Cooper and Pierce.
  • Retcon: With the exception of Cooper, whose origin never was clearly defined beyond being the child of Plumbers, they were all initially introduced as Human-Aliens hybrids born from Interspecies Romance between alien and human Plumbers. The Rooters story arc retcon them into being ordinary kids who got experimented on by the Rooters and were given their alien characteristics using Kevin's power, all in order to create a weapon capable of destroying Ben.
  • Punny Name:
    • Helen Wheels being of "Hell-on-Wheels". Doubles as Getting Crap Past the Radar.
    • Manny Armstrong being of "Many arms, strong"
    • Alan's surname "Albright" references how his he's a "walking beacon".
    • Of course the guy named Pierce has the ability to shoot needles.
  • Similar Squad: The original three Plumbers Helpers (Pierce, Helen, and Manny) was this to Ben's Team (Ben, Gwen, and Kevin).
  • Stock Superpowers

Cooper Daniels

Voiced by Cathy Cavadini (Original Series), Corey Padnos (Alien Force), Chris Pratt (Ultimate Alien), Eric Bauza (Omniverse, flashback)

Alan Albright

Voiced by Zeno Robinson (Alien Force, Ultimate Alien), Bumper Robinson (Omniverse)

  • Butt Monkey: He is often treated as the weakest member of his team, especially by Manny.
  • Characterization Marches On: Alan was initially introduced as a shy kid, lacking self-confidence and the youngest of the group. When he comes back in Omniverse, he is now much more hot-headed, snarkier and the closest thing the group has to a leader after Pierce's death.
  • Character Development: See Grew a Spine below.
  • Chest Blaster: Sort of, he fired a ball of flame from chest in his debut appearance.
  • Cursed with Awesome: He felt that way about himself at first, but Ben helped him grow out of it.
  • Expy: Alan has literally been called "a smaller Heatblast".
  • Flaming Hair
  • Grew a Spine: In his early appearances he was very uncertain of himself, but he progressively becomes more confident.
    • In fact Manny literally tells him to "grow a spine" in "Above and Beyond".
  • How Do I Shoot Web: In his first appearance, he had some serious trouble learning how to fly. Ben eventually taught him a few tricks to help.
  • Mirror Self: Ben stated that Alan reminded him of a younger version of himself, especially in the sense how they both had trouble controlling their power.
  • Pint-Sized Powerhouse: Physically the smallest and youngest member of the team, but his powers give him the potential to be the strongest of all. However he often had to be coaxed into this by support from his teammates. In fact, Ben literally calls him "a powerhouse" when they first meet.
  • Playing with Fire: Due to his Pyronite powers.
  • Sixth Ranger: He's the newest member of the Plumbers Helpers' (other than Cooper).
  • Tag Along Kid: In Alien Force he was the youngest member, and was treated as such.
  • You Are Better Than You Think You Are: Is taught this by Ben and Helen.
    • Subverted in "Above and Beyond" when Ben (as Big Chill), while pretending to be evil, tells him:
    Big Chill: You're out of your league Alan, you're the weakest one and you know it. You're teammates know it too.

Manny Armstrong and Helen Wheels

Manny Armstrong voiced by Khary Payton
Helen Wheels voiced by Juliet Landau

  • Arrogant Kung-Fu Guy: Manny, played straight.
  • Ax-Crazy: Manny is reckless, impulsive, and loves to bash or shoot things.
  • Berserk Button:
    • For Helen, whenever someone brought up Pierce.
    • Manny also doesn't take Kevin insulting his appearance too well.
  • Blood Knight: Manny lives for combat, and relishes every second of it.
  • Energetic Guy, Savvy Girl: Manny and Helen respectively.
  • Cloudcuckoo Landers Minder: Even though he isn't technically a Cloudcuckoo Lander, Helen still acts as one to Manny, as she holds him back from his acts of immaturity.
  • Cool Big Sis: Helen acts as one to Alan and Cooper, giving them guidance and encouragement.
  • Expy: Manny and Helen are half-Tetramand (Fourarms) and half-Kineceleran (XLR8).
  • Hypocritical Humor: Manny has a tendency to call his enemies "Dirty alien freaks" (or something similar), even though his own appearance holds little traces of humanity. This is played with during an exchange of insults he has with Kevin when they first meet.
    Manny: They're all dirty alien freaks.
    Kevin: That's a laugh coming from a Halloween reject like you.
    ( later on)
    Manny: Think you're funny?
    Kevin: Hey you're the comedian. You even have the face for it.
  • Jerk with a Heart of Gold: Manny comes off as being very rude and obnoxious, but will still put the lives of others before his own when the time is right.
  • Man Child: Manny is physically the largest helper, but the most immature of them all.
    • Lampshaded in "Vengeance of Vilgax Part 1" where he keeps "calling shotgun" to ride in the front seat. The other helpers shake their heads or Facepalm in response.
  • Mirror Self: Manny is this to Kevin (reckless, rude, and eager to fight) while Helen is this to Gwen (kind, compassionate, and cautious). Fittingly each of them are pitted against their counterparts when they first meet.
  • Multi-Armed and Dangerous: Four arms means four guns. You probably don't want to be on the receiving end of Manny's blaster fire.
  • Out of Focus: By Ultimate Alien they are the only members of the team to stop making appearances, even though their voice actors still appeared on the show.
  • Pink Girl, Blue Boy: Gender inverted for Manny and Helen.
  • Red Oni, Blue Oni: Manny and Helen fit this perfectly, and have even been Colour-Coded for Your Convenience.
  • The Smurfette Principle: Helen is the only female in the team.
  • Scary Black Man: Manny. He was black when he was human. Fitting since he's voiced by Khary Payton, who usually voices black characters.
  • Ship Tease: Throughout the series.
  • Super Speed/Super Strength: Helen and Manny's respective default powers, thanks to their alien heritage or at least what was originally thought to be their heritage.
  • Team Mom: Helen serves as this, acting as a Cool Big Sis to Alan and Cooper, while restraining the immature Manny from acting recklessly.
  • Vitriolic Best Buds: Manny, with Pierce.
  • Younger Than He Looks: Contrary to what his size suggests, Manny's still a teenager.

Pierce Wheels

Voiced by Adam Wylie

  • Back for the Dead: He returns in Ultimate Alien only to be killed.
  • Brick Joke: Pierce is the only one whose appearance doesn't come from any Omnitrix alien. His alien half is Argit's species.
  • Continuity Nod: Possibly unintentional, but his design and powers bear striking similarities with a one-shot character from the Original Series who appeared in episode Ready to Rumble.
  • Dropped a Bridge on Him: Pierce is one of the Forever Knights' first victims in "The Purge".
  • Expy: Pierce's powers are reminiscent of a certain needled X-Man.
  • Killed Off for Real: He is one of the few prominent characters to actually die.
  • Mirror Self: To Ben, which is specifically mentioned by Helen, with both being logical and calculating and serve as the team leaders of their squads.
    • As Ben didn't initially get a chance to duke it out with his counterpart as Gwen and Kevin did, he is later given the opportunity when the two meet in "Voided".
  • Prickly Porcupine: It's revealed that the donor of his alien DNA was Argit.
  • Sacrificial Lion: Pierce's cold blooded murder by the Forever Knights showed just how merciless and dangerous they'd become.
  • Vitriolic Best Buds: With Manny.

    Azmuth 

Azmuth

Voiced by Robert David Hall (Original Series, Destroy All Aliens), Jeff Bennett (Alien Force, Ultimate Alien), Rene Auberjonois (Omniverse)

The brilliant, if cynical and obnoxious, creator of the Omnitrix. A hundreds years old Galvan (Grey Matter's species) considered as the smartest being in three galaxies, Azmuth created the Omnitrix as a mean to allow all specie to be in each other shoes and better understand each other, and as by this way promote peace. As such, he was disgusted when people like Vilgax attempted to use it as a weapon, becoming disabused with the Universe. After Ben proved him the Omnitrix could still be used for good however, he got back part of his hope in the Universe and started to act as one of Ben's Mentor.

  • Above Good and Evil: Had two variations of this over the course of the series:
    • In the Original series, he only wanted beings from the universe to understand each other, and the use of the Omnitrix as a weapon by one person was the same as another, and the sides and reasons did not matter.
    • Afterwards, his dedication became to the universe, and sees the universe as it is, as Albedo found out—The battles between good and evil within the universe are petty and insignificant. The ambition of those who are "evil" is ultimately pointless, as to tear down and destroy is of no consequence or quality.
    • Maltruant also states that regardless of the time or dimension, Azmuth is always too smart to be evil, which is why in order to get himself repaired, he had to settle for the second smartest being in the galaxy, Dr. Psychobos.
  • The Atoner: He once created the Ascalon sword, a weapon so powerful it caused the destruction of the Inkursian home planet after one of them tried to use it to unify his species. This is partially the reason he then dedicated himself to pacifist causes.
  • Badass Bookworm: Not so much most of the time, but Showdown Part 1 demonstrates us that he can be quite a great exemple of it if needed.
  • Big Good: shares the position with Max and Paradox.
  • Composite Character: His Omniverse incarnation takes a few of the core personality traits from the first series, such as his Jerk Ass tendencies, but utilizes the general aesthetic of the Alien Force and Ultimate Alien incarnations as well as some of the gadgets (particularly the teleportation, which is explained).
  • Cool Old Guy: Zig-zagged; he is irrascible, pessimistic, insufferable and brash, but on the other hand, he is well-intentioned, and does displays a softer side on occasions.
  • Crazy-Prepared: He's called the "First Thinker" by the Galvans because he tries to prepare for every contingency he can think of. For example, he built a device to disable the Omnitrix in case it ever fell into the wrong hands, which he uses on Albedo in Omniverse.
  • Create Your Own Villain: A speciality of him; to date, he's responsible for turning the Inkurseans into space pirates, giving Sir George the Ascallon Sword, and accidentally screwing up the body and mind of Malware. It's also implied that his dickery was what led Albedo to turn out the way he is.
  • Cynical Mentor
  • Figure It Out Yourself: "Don't you want to figure it out on your own, like a true hero would?"
  • For Science!: This used to be his primary motivation until it cost him his girlfriend and he created a weapon that destroyed a planet; in the present his intentions are more altruistic, like creating the Omnitrix.
  • Good Is Not Nice: He is a well-intentioned scientist, a convinced pacifist and want nothing but good for the universe. Sadly, he has the bad habit to act like a dick with almost everyone around him.
  • Heel Realization: He realizes it's just stupid to blow up the universe when the Omnitrix is near self-destruction.
  • Insufferable Genius: Though he can back it up, much better than Albedo.
  • Jerk with a Heart of Gold
  • Mad Scientist: Sort of; He is currently more or less a reasonable scientist, but he still tends to be... eccentric, to say the less.
  • My God, What Have I Done?: His reaction when he found out what the Incursians did with the Ascalon sword.
  • No Social Skills: That would almost be an understatment; Azmuth has a bad habit to act like an obnoxious jackass with a lot of people around him, even though he almost always mean well; his first assistant ditched him for not according her any credit about the creation of the Omnitrix, his other assistant developped a massive superiority complex on him that led him to commit a Face-Heel Turn, his girlfriend left him because he was neglecting her for his work (and he didn't notice she had left until it was far too late) and one of his creation became a rampaging sociopath because he took his time to find a cure to heal him.
  • Not So Different: He's immature, selfish, cracks jokes at inopportune times, but when it comes down to it, he can be helpful... sort of like Ben. This is all the more obvious when he says that he likes Ben for saying that he didn't want to figure out how to work the Omnitrix better (or, more specifically, allowing Ben to change forms at will within alien form).
  • Restored My Faith In the Universe: By the time Ben met Azmuth in Secret of the Omnitrix, the scientist had completely given up on the whole Universe, to the point that he was willing to let it, along with himself, be destroyed. However, after seeing Ben in action, he has a Heel Realization, helps Ben win, and becomes more rational in later episodes
  • Same Character, but Different: Was a lot more sarcastic and cynical when we first see him in Secret of the Omnitrix, but is more stoic and serious (though retaining a sense of sarcasm) by the time of Alien Force. Justified in that there was a five year Time Skip in-between appearances.
  • Science Hero
  • Sink-or-Swim Mentor
  • The Spock
  • Technical Pacifist
  • The Watcher: he can follow Ben's use of the Omnitrix on regular basis through elements inside the Omnitrix.
  • Took a Level in Jerkass: He has always been kind of a dick, but Omniverse tends to exaggerate this aspect of his personality; he openly doesn't care when Max asks him for help about Ben being trapped in alien forms and refuses to help until Ben starts wrecking his own lab, and takes a petty revenge on Albedo for capturing him by casually trapping him in a 10 years old Ben form.
  • Unwitting Instigator of Doom: His creation of Ascalon led to the destruction of the Incursean's homeworld, and giving it to George led to the foundation of the Forever Knights.

    Kai Green 

Kai Green

Voiced by Bettina Bush

Ben's first shown Love Interest, and granddaughter of Wes Green, a retired Plumber and old friend of Max. She began to take an interest in Ben after he began transforming into Blitzwolfer, though only because she wanted to keep him as a pet. According to a pop-up in the enhanced version original series episode ''Ken 10'', she is Ben's future wife and Ken's mother.

  • Absurdly Sharp Blade: Excalibur is capable of cutting through blast proof doors like the were butter.
  • Action Girl: In Omniverse thanks to after school judo lessons.
    • Badass Bookworm: Incredibly well versed in history and uses Big Ben's chimes as a distraction. Predicting just when they come.
    • Badass Normal: Uses martial arts and knowledge of alien technology to fight.
    • Took a Level in Badass: Between the original series and Omniverse.
    • Future Badass: In the 10k future timeline she has at some point found Excalibur and it is her main weapon.
  • Adventurer Archaeologist: Alongside her grandfather in Omniverse.
  • Ascended Extra: While Man of Action did confirm she was Ben's wife in the future, she actually had a very little role in the Original Series, appearing only in Benwolf as a character and in Perfect Day as a cameo in Ben's dream, while she was completely absent in Alien Force and Ultimate Alien. Omniverse brings her back and makes her a recurring character, as well as Ben's final Love Interest.
  • Belligerent Sexual Tension: She and Ben have this dynamic in Omniverse, which leads to...
    • Everyone Can See It: The Forever Knights mistake them for boyfriend and girlfriend and rook calls their back and fourth arguing "romantic bantering".
  • Betty and Veronica: She's the Veronica to Esther's Betty.
  • Deadpan Snarker: Has become this in Omniverse.
  • First Girl Wins: A double subversion: it isn't the case at first in "Benwolf", but ends up being played straight after all in "Ken 10". Word of God even confirms that she is the ultimate winner in Ben's Omniverse "harem." This comes to pass in "Most Dangerous Game Show"
  • Flanderization: In the Original Series, her interest in Blitzwolfer was fairly subtle; she was interested in him in that she thought it could be amusing to have him as a pet, which was only expressed in one line at the end of the episode. When she comes back in Omniverse, it has turned into a borderline obsession, to the point she encourages Ben to turn into him whenever the occasion presents itself, and uses Bliztwolfer's picture instead of Ben's for his profile on her phone. Most Dangerous Game Show pushes it even further by having her apparently love all of Ben's aliens but acting disdainful of him when he is in human form, to the point she treat them like separate individuals.
  • He's Not My Boyfriend: Says this about Ben in Omniverse. While it's true, there's clear sexual tension going on between them.
  • Kick the Dog: Infamous for this in the Original Series, where she got interested in Ben only because she wanted to keep Blitzwolfer as a pet, something she flat-out admitted in his face with no remorse. Even Gwen was outraged by such an attitude.
    • To be fair, her lack of remorse is a case of her being pretty obliviously jerkish. She was too young and socially inexperienced to realize just how messed up it was, saying "I could train you, tame you...you know!" in such a way that she thought Ben, or anyone really, would be totally understanding of her mindset. At least she preceded it by saying Ben was still a nice guy and "the alien thing is cool".
  • Love Interest: Ben's, though it's mostly one sided in the Original Series. In Omniverse, the two have Belligerent Sexual Tension in spades, hold each other's arms after Ben rescues her from falling off of Big Ben, though they break as soon as it's commented on. And she gives him a goodbye kiss on the cheek. "Secret of Dos Santos" is chock full of Belligerent Sexual Tension between the two, and she gives Ben (as XLR8) a kiss on the lips when he discovers the path to the temple.
  • Loves My Alter Ego: In her first appearance, she was more interested in Ben when he was Blitzwolfer. She shows signs of this in Omniverse, wanting Ben to turn into Blitzwolfer, and petting him when he does and subsequently saves her from falling (though she does give Ben a parting kiss on the cheek).
  • Official Couple: As of "Most Dangerous Game Show".
  • She Is All Grown Up: Ben points this out as soon as he meets her again in Omniverse. Then again, so's he.
  • Teeth-Clenched Teamwork: Once she and Ben meet again, this is the relationship they have. Even in the future where they are married with children they still bicker when fighting together.
  • Tomboy and Girly Girl: Girly-Girl to Gwen's Tomboy in the original series, but the Tomboy to Esther's Girly-Girl in Omniverse.
  • Took a Level in Badass: In Omniverse compared to the original show.
  • Took a Level in Jerkass: Also in Omniverse. Her Kick the Dog moment in the original was done out of youthful obliviousness, but now she knows exactly what she's doing when she's mean to Ben. To be fair, Ben often gives as good as he gets.

    Paradox 

Professor Paradox/Timewalker

Voiced by David McCallum

An unknown scientist from the Cold War who was experimenting on Time Travel. His experiment went wrong, causing him to end up floating randomly through space and time for ten thousand years, unable to die or age. Though initially becoming insane because of it, he eventually became Bored With Insanity, and was able to take control over his time travel, starting to use it to save Earth at various points by alternating the course of time. This led him to meet with Ben's team during the Alien Force era. Though eccentric, he is otherwise a reliable ally.

  • The Ageless: Due to existing outside of time, he can't age and apparently also doesn't need to eat or sleep. This also makes him immune to time manipulation to some degree (he can't be aged into dust or anything like that, but he still feels it to some degree).
  • Artificial Limbs: His Omniverse version apparently lost his hand in the Time War and has replaced it with a bionic hand.
  • Badass: Well, he is based on the Doctor, so this is a given.
    • Cultured Badass: He dresses and speaks the part.
    • Badass in a Nice Suit: Nice tie.
    • Badass Boast: Tells Eon that if he goes through with his plan, no force in all of time will be able to protect him from Paradox.
    • Badass Bookworm: Well, he used to be a scientist after all and since his field was studying and manipulating time... Well, he's better at that now.
    • Badass Pacifist: He doesn't like to fight and rarely does it, but gosh, when he does something, it is awesome. Watch War of the Worlds to see what we mean.
  • Big Good: Shares the position with Azmuth and Max.
  • Bored With Insanity: In his own words:
    "At first, I went mad, of course. But after a few millennia, I got bored with that, too, and went sane. Very sane."
  • Call Forward: Word of God said that in Race Against Time (a movie that's otherwise questionably canonical), Paradox guarded the Hands of Armageddon from Eon for several years until Ben stopped him.
    • This is finally revealed in "Ben 10,000 Returns". The movie was actually part of 'cross-time' and thus Paradox guarded that alternate timeline's Hands of Armageddon
  • The Cameo: He makes a brief one in Blukic and Driba Go to Area 51. Prior to becoming immortal, he worked at Area 51 with Max and Colonel Rozum.
  • Cloudcuckoo Lander: His constant time travel and immortality cause him to often appear as this; he doesn't live events in the right order (for example, he apparently met a future version of Ben before meeting present Ben for the first time) and will offer gumballs to people in unappropriate situations.
  • Cool Old Guy: He doesn't look like it, but he is really 10,000+ years old.
  • Does Not Like Guns: When first meeting Colonel Rozum, he removes his gun from him without him noticing and throws it away, saying he never liked them.
  • Expy/Homage: The Doctor, especially the tenth incarnation.
    • The quirk of offering gumballs brings to mind Tom Baker's Doctor (with him offering jelly babies.)
  • The Fog of Ages: He calls himself 'Paradox' because he can't remember what his real name is (despite the fact he meets an old colleague who does).
  • Go Mad from the Isolation: Spent nearly ten thousand years floating randomly through time, but eventually, he got Bored With Insanity and went sane again. Very sane.
  • The Herald: He will pop out of a time portal near Ben and say, "I need your help with X".
  • Hero of Another Story: He is constantly on adventures of his own and the first time he appears, it's stated he's already saved the world hundreds of times.
  • Mysterious Past: A past even he barely remember due to The Fog of Ages.
  • Offscreen Teleportation: He has this ability due to 'finding shortcuts' in time. Though he's also very capable of onscreen teleportation.
  • Only Known by Their Nickname: Everyone calls him Paradox, even himself. He says he has forgotten his name after the many millennia he has lived, though his former lab assistant appears to be the only one left knowing.
  • Other Me Annoys Me: Subverted, as when they meet the parallel Paradox he warns his counterpart not to follow the same course of his actions.
  • Persona Non Grata: He is banned from interacting with Alien X (or any Celestialsapien, for that matter), for reasons unknown.
    • May have something to do with hiding the Forge of Creation, which is a Noodle Incident in itself.
  • Red Baron: "Timewalker".
  • Really 700 Years Old: He looks middle-aged but is the oldest thing in the series, other than the universe itself.
    • And considering the current universe is an Alien-X made reboot, he may have graduated to oldest thing period.
  • Set Right What Once Went Wrong: His job for the past several hundred years.
  • Sink-or-Swim Mentor: In the sense that he can't outright interfere, but he does provide hints and warnings that help guide Ben and the others' actions.
  • Stealth Mentor: Goes right along with Sink-or-Swim Mentor.
  • Temporal Paradox: Once a theory of his, now the frequent results of his actions.
  • Time Abyss: Originally from The Fifties, he was sent back to the beginning of time and went on from there.
  • Time Dissonance: He can displace his time and location at will and he doesn't need to eat or sleep. He never ages.
  • Time Master: See: Time Dissonance.
  • Time Police: Self-appointed.
  • Time Travel Tense Trouble: For instance, "You're much smarter than you were when I met you later."
  • Timey-Wimey Ball: Several time travel theories can be drawn from him depending on the episode.
  • Trickster Mentor: Another technique he uses.
  • You Can't Fight Fate: Played with; he himself constantly changes the timeline to save the world, but much like the character he is based on, he seems to follow the idea that there are some events that cannot be changed. Most notably, he advises Gwen against trying to prevent Kevin's mutation in season 3 of Alien Force.

    The Plumbers 

The Plumbers

  • Arch-Enemy: They used to be this with an alien species called Sludgepuppies. The whole point of Big Fat Alien Wedding was to end the conflict by marrying their Star-Crossed Lovers.
  • Ascended Extra: They have always been important, but in the Original Series, they were essentially a background element used to give Max a backstory and justify some of the non-alien high-tech used in the story. In the sequels, they got a progressively bigger role.
  • Big Good: The Magistrata.
  • Cardboard Prison: Plumber HQ in Omniverse is absolutely terrible at keeping its prisonners; villains constantly escape from it, sometimes offscreen (like Psyphon, who got arrested around three times yet always is on the run again by the next episode he shows up), and when they are shown escaping (Albedo, Dr Animo and Zombozo), they do it incredibly easily. Lampshaded by Ben in Something Zombozo Comes This Way when he and Max discovers Zombozo managed to easily escape and pretend he was still there by leaving a kidnapped Plumber disguised as him, with nobody apparently considering checking him sooner, nor anyone finding it suspicious a Plumber disappeared.
    Ben: "Plumbers HQ really needs to work on its security system, Grandpa!"
  • Elaborate Underground Base: In Omniverse, their headquarters in Bellwood are this.
  • In-Series Nickname: "Red spots" in Omniverse, due to their red-coloured badges. Note that this is only the case in Omniverse; their badges were never shown in the Original Show, and were portrayed as looking similar to the Omnitrix symbol in the Alien Force/Ultimate Alien era.
  • The Men in Black: In the Original Series.
  • Men of Sherwood: When they aren't falling under Police Are Useless, they are this.
  • Order Reborn: As explained in Omniverse, the group was rebuilt during the Time Skip between the Original Show and Alien Force.
  • Police Are Useless: For most of the Alien Force/Ultimate Alien era, they were pretty useless the few times we saw them, and it was even implied they willingly limited their ressources on Earth because they couldn't afford wasting them on a backwater planet. They get slightly better in Omniverse thanks to Earth becoming an open system and allowing them to operate more freely, but they still tend to be conveniently absent or ineffective whenever they could end the episode quickly (for example, they don't show up at all when Looma's father threatens to blow up Earth in Many Happy Returns), villains manage to easily infiltrate their HQ several times despite all the security systems, and their prison still somehow fails to keep criminals like Psyphon contained for a long time. Also, they recruited Blucik and Driba as their technology expert.
  • Retcon: In the Original Show, they were portrayed as a mostly human secret organisation that dealt with paranormal. In the sequels, they are portrayed as a space police where most members are aliens.
    • They were also explicitly stated in Ultimate Alien to only deal with aliens, to the point they couldn't get involved in arresting supervillain King Vicktor due to him being originally human; in Omniverse, they are seen dealing with some non-alien villains such as Doctor Animo and Billy Billions (who are both full-blood humans) and Zombozo (who has been confirmed by Word of God to be a supernatural being).
  • Retired Badass: In the Original Series, most Plumbers we get to see are retired members who stopped their activities long ago, but still have plenty of skills and alien tech at their disposal.
  • Shout-Out: Their armors in the Original Series were very reminiscent of the Ghostbusters.
  • Space Police: In Alien Force onward.

Important Plumbers:

Magister Patelliday

Voiced by Rob Paulsen

A Pisciss Volann (Ripjaw's species) Plumber, and the second-in-command of the Plumbers on Earth.

  • Alluring Anglerfish: being of Ripjaw's specie will make you that, though he is not as impressive as Ben's version of his species.
  • Ascended Extra: he appeared for the first time as a cameo character in Ultimate Alien episode Mother of All Vreedles. Ben 10: Omniverse makes him the Second-in-Command of the Earth' Plumbers and a recurring character.
  • Badass
    • Badass in Distress: in Gone Fishing, he is captured by Space Pirates who attempt to serve him to their captain as lunch. Max display limited concern, insisting Patelliday can handle himself of his own. He indeed escapes easily before they arrive: the only reason he was staying as a prisoner was to better figure out what the pirates were up to.
    • Crouching Moron, Hidden Badass: his appearance and mannerism are much less impressive than Ripjaw, and he seems like a comical character at the first approach, but much like Max, he is more than meet the eyes, as proven in Gone Fishing and Rooters of All Evil.
    Phil: Aren't you getting a little long in the tooth?
    Patelliday: You tell me. (bites him)
  • Mauve Shirt: Is one of the few named Plumbers outside of Max and the main cast, and he recurs quite frequently (compared to the other magisters: Labrid and Gilhil).
  • More Teeth than the Osmond Family: not as obvious as for Ripjaw, but still visible.
  • Number Two: To Max.
  • Remember the New Guy: He has been introduced in Ultimate Alien only, but both a conversation between Max and him and a a comment from Phil suggest that he was there before the Plumbers disbanded pre-Original Series, and might even have been the first alien Plumber to operate on Earth.
  • Shout-Out: His voice is a homage to comedian Don Knotts, who starred in The Incredible Mr Limpet as a man who becomes a fish.
  • Super Not-Drowning Skills
  • Weaksauce Weakness: Averted; according to Word of God, his suit includes systems that allow him to stand out of water without dehydrating like his species usually does. Still a problem in the season 3 finale, where a month in captivity with minimal water is enough to overwhelm the suit.
    • Sustained high temperatures can also be a problem, as shown in "Clyde 5," where Vera Tennyson cranks up the heating of Plumber HQ, leaving Patelliday almost completely dehydrated in a matter of minutes.

Magister Labrid

Voiced by Jeff Bennett

A Plumber officer, and one of Max's friends in the Plumber; He shows up in Alien Force's Pilote to investigate on the Highbreed invasion and help Ben find Max. He gets killed, and leaves to Ben the mission to end the invasion.

Magister Prior Gihill

Voiced by J. K. Simmons

The Plumber officer in charge of the sector where Earth is located during the Alien Force/Ultimate Alien era.

Victor Valadis

Played by Hebert Siguenza (Alien Swarm), Brian George (Ultimate Alien)

A Plumber introduced in the Ben 10: Alien Swarm movie, and Elena's father.

  • Brainwashed and Crazy: Courtesy of the Hive.
  • Cassandra Truth: He tried to warn the other Plumbers about the sentience of the Hive, but wasn't listened to.
  • Dropped a Bridge on Him: Dies in the time between Alien Swarm and Ultimate Alien.
  • Killed Off for Real: In Ultimate Alien.
  • Large Ham: In Alien Swarm, while controlled by the Hive.
  • Mad Scientist: subverted; he was believed to be this, but his actions actually had a really sane motive.
  • Posthumous Character: In Revenge of the Swarm.
  • Red Herring: The beginning of Revenge of the Swarm sets him up as the main antagonist for the episode. He actually was dead in the time between Alien Swarm and that episode; the real villain is Elena, possessed by the Hive.
  • Shaggy Dog Story: Ben goes through a lot of trouble in Alien Swarm to defeat the Hive without having to kill him... only to have him die anyway in Revenge of the Swarm.

Blukic and Driba

Voiced by Paul Eiding (Blukic) and Eric Bauza (Driba)

A duo of Galvans introduced in Ben 10: Omniverse. The two of them are tech support in the Plumbers' HQ, in charge mostly with machines. Though they possess advanced knowledge in technology like all Galvans, they are incredibly dumb when it comes to practically everything else.

  • Aliens Speaking English: While that is very obvious in this universe, they take it Up to Eleven by being able to write in English, albeit poorly spelled.
  • Are You Pondering What I'm Pondering?:
    Driba: Are you thinking what I'm thinking?
    Blukic: I hope not.
  • Attention Deficit... Ooh, Shiny!: in one episode, they are distracted by a Mr Smoothie commercial while Ben and the other Plumbers are dealing with a crisis.
  • Been There, Shaped History: They were the aliens that crashed near Roswell.
  • Big Guy, Little Guy: They're both pint-sized, but Blukic is tall while Driba is short and squat.
  • Fantastic Racism: They seem to have it out for Cerebrocrustaceans, as they have been known to make unpleasant comments about the species at least twice in the show.
    Driba: "We are not Cerebrocrustaceans; we know what we are doing."
  • Fat and Skinny
  • Gadgeteer Genius
  • Genius Ditz: While they have the natural intelligence that comes with Galvans, they are very stupid for their species. They are smart enough to repair the Omnitrix when a piece is missing in "Outbreak", albeit after several failed attempts. In Catfight, they also created a remote control for the Omnitrix. However in "Evil Encore" they make an emergency exit in the ventilation shaft, but are too stupid to make it bigger then Galvan height.
  • Guttural Growler: Blukic has a gravelly, bass voice.
    Blukic: ayup...
  • Informed Ability: Despite being recognized as dumbasses by Galvan, they are supposedly smarter than any human being, and even smarter than Cerebrocrustaceans. As Ben lampshades it, we have yet to see any indication of that.
  • The Load: Safe for a few times where they actually prove useful, they tend to mostly makes things worse for the Plumbers, and their stupidity almost killed the heroes at least twice. You seriously come to wonder why they even keep them around.
  • Metaphorgotten:
    Driba: Like Icarus, we flew too close to the sun. And like Icarus, we never got our smoothies...
  • Nice Job Breaking It, Hero: They fixed the Anihilarg.
  • Noodle Incident: When the two get eaten by a humongous alien elephant super-villain, Bluric mentions "this is the second worst time I've been stuck in an elephant's mouth." We never find out what the first was.
  • Normal Fish in a Tiny Pond: Dumb by Galvan standards, geniuses by Earth standards. Or so people say.
  • Percussive Maintenance: Blukic fixes things by hitting them with a wrench. Surprisingly, this actually seems to be some of his most effective repair work.
  • Remember the New Guy: According to a flashback, they were active as Plumbers on Earth since Ben was eleven. Yet, no mention was ever made of them during the Alien Force/Ultimate Alien era.
  • Shorter Means Smarter: well... supposedly at least.
  • Skewed Priorities: They apparently consider getting smoothies to be more important than possibly being demoted.
  • The Smart Guys: though Ben begs to differ.
  • Those Two Guys: They are almost never seen apart, and the one time they are, they greatly miss one another.
  • Too Dumb to Live: Practically everything they do; they abandon the Plumbers during a major crisis to go get Smoothies, somehow repaired a Doomsday Device capable of destroying the Universe and build Galvan-sized doors in a base meant for humans and other alien species. It's practically a miracle they haven't been fired already for their incompetence.
  • Tuckerization: They are named after storyboard artists and directors Butch Lukic and Dan Riba.

Lucy Mann

Voiced by Tara Strong

Lucy is a Sludgepuppy, a species of shapeshifting sludge aliens, and Ben and Gwen's cousin-in-law. She is the cousin of Joel Tennyson's wife, Camille Mann.

  • Action Girl: While she mostly uses her powers for espionage like things, she is fully capable of kicking ass.
  • Annoying Laugh: A snorting giggle.
  • Ascended Extra: Only appeared once as a very minor character in the original series, in the episode Big Fat Alien Wedding (in fact, she had only two scenes that barely last two seconds, and wasn't even the main focus of said episode). In Omniverse, she is shown to have hung out a lot with Ben and Gwen as kids and later she joins the Plumbers, being the first Sludgepuppy to do so, and gets a whole episode dedicated to her.
  • Catch Phrase: Psyche!
  • Cute Monster Girl: Played with in a more subtle way than the Original Show. In Big Fat Alien Wedding, Camille's evil mother had a classic monstrous Sludgepuppy form, while Camille herself had a more humanoid, attractive one. Lucy in Mud Thicker Than Water shows the ability to use both variants.
  • Eldritch Abomination: Lucy's full Sludgepuppy form is a benevolent example.
  • The Gadfly: Likes using her powers to trick people, especially Gwen.
  • Lawyer-Friendly Cameo: In the original series she looked like Naruto's female form, whisker marks and all.
  • Genki Girl: Not much removes the smile from her face, and even a fight won't stop her from pranking people.
  • Red Herring: Mud is Thicker than Water is set up to make her seem like The Mole. In reality, she was a Reverse Mole hired to help discover the real mole, a Tetramand named Gorvan.
  • Shapeshifting: Apparently, Ben is not the only shapeshifter in the family.
  • The Reveal: Her being a Sludgepuppy in the original series as it is easy to forget she came from the bride side of the family in addition to her short screen time. It's only until the end this was showcased when Ben ends up slipping on her sludge while trying to dance with her at the reception.
    • Troll: A Running Gag in "Mud is Thicker than Water" is pranking Gwen with her shapeshifting. "Psyche!"
  • Token Heroic Orc: Sludgepuppies were best-known for being the Plumbers' sworn enemies for years. She is the first of them to join their ranks. Though to be fair, by the point she joins, the war between the two has been over for around six years.
  • Zettai Ryouki: Grade A in current Timeline.

Hobble

Voiced by Steve Blum

A cowardly insect-like alien, and member of the Plumber's Alpha Squad, who first appears in Vilgax Must Croak, and later joins Ben, Rook, and Rad Dudesman in their trip to the Anur System.

Scout

A Loboan Plumber operating on Anur Transyl, and one of Rook's former classmates. He serves as their ally during their visit on Anur Transyl in the Galactic Monster story arc.

Molly Gunther

Voiced By: Tara Strong
A recurring plumber and a member of Alpha Squad.

    Alternate Bens and Omnitrix wearers 

Ben 10,000

Voiced by Fred Tatasciore (original series), Sean Donnellan (Ultimate Alien), Judd Nelson (Omniverse)

Ben's future version. Since the future is constantly changing, and there are various timelines, we have seen different versions of Ben 10,000 over the course of the franchise.

  • Badass
    • Badass Beard: One of the things all Ben 10,000 have in common.
    • Future Badass: Another thing all versions of Ben 10,000 have in common is that they are several times more badass than Ben's present self, usually having unlocked the Omnitrix's full potential and lost their immaturity with age. They all have access to 10,000 alien forms at the very least, can switch between forms with no glitches or time limit and fully know how to operate the Omnitrix even without the Master control.
  • Composite Character: Omniverse's Ben 10,000 uses a modified version of the original incarnation of Ben 10,000, but has some of the immature tendencies of his Ultimate Alien counterpart, despite "Ben 10,000 Returns" being made non-canon.
  • Fusion Dance: In Omniverse, his Biomnitrix allows him to transform into alien fusions, such as:
    • Atomic-X: Atomix + Alien X
    • Fourmungousaur: Four Arms + Humungousaur
    • Crashshocker: Crashhopper + Shocksquatch
    • UpRigg: Upgrade + Jury Rigg
    • Big Chuck: Way Big + Upchuck
    • Humungoopsaur: Humungousaur + Goop
  • Gadgeteer Genius: According to Word of God, he used the minds of his smartest aliens to create a second Omnitrix for his son, and did the same to create his Biomnitrix.
  • Happily Married: To Kai Green in the Original Series and Omniverse, though in the former's case this is only known through Word of God. Ultimate Alien Ben 10,000's marital status is unknown.
  • Informed Ability: None of them ever get to use all 10,000 forms they are stated to have. Justified in that seeing 10,000 different aliens would require a lot of episodes.
  • Kick the Son of a Bitch: Before his past self managed to make him grow out of his jerkassery, Original Series Ben 10,000 dealt with Vilgax by literally ripping him to pieces so he wouldn't come back again (It didn't work). Considering the victim was Vilgax, it's hard to blame him.
  • Man Child: Compared to the other versions of him, Ultimate Alien's Ben 10,000 really isn't much more mature than his present day self. Omniverse's Ben 10,000 qualifies as well.
  • One-Man Army: Up to Eleven; Original Series Ben 10,000 was stated to have become so efficient he single-handedly patrolled the whole world to deal with criminals everywhere, making police and other superheroes obsolete.
  • Overprotective Dad: Initially towards Kenny.
  • Our Presidents Are Different: President Action variety with Ultimate Alien Ben 10,000, who stated he was once President of Earth during a Vilgaxian invasion. Though he stepped down later to let Gwen take over.
  • Papa Wolf: Towards his son, Ken. Deconstructed in Ken 10, where he acts so protective toward Ken he doesn't actually leaves him a chance to prove himself.
  • Ret Gone: Ultimate Alien's Ben 10,000 was written out in favor of a new version of the character closer to the Original Series.
  • Super Mode: Ultimate Alien Ben 10,000's "Ultimate Ben" form allowed him to use all his aliens' abilities without actually transforming into them.
  • Took a Level in Jerkass: Original Series Ben 10,000, when met by his past self, had become cynical and quite asocial, spending all time in his alien forms and refusing any help. He gets better by the end of the episode.
  • Transformation Name Announcement: Both Ultimate Alien and Omniverse Ben 10,000 activate their unique abilities (respectively his Ultimate Ben alien powers and his fusion forms) by shouting the name of the forms.
  • Voluntary Shapeshifting: Unlike Ben's present self, Original Series Ben 10,000 has unlocked the Omnitrix' master code, allowing him to switch between all his form with no glitches, time limit or need to push the dial. Presumably the other Ben 10,000 can do this as well.
    • Shapeshifter Default Form: In the original series, his most commonly used form was XLR8, as it allows him to patrol the world much faster. Whenever he wasn't in a fight, XLR8 was the form he was in.

Kenneth "Kenny" Tennyson

Voiced by: Tara Strong (Original Series), Scott Menville (Omniverse).

Ben 10,000's son. Was given an Omnitrix of his own on his tenth birthday. He is named after Gwen's older brother, Ken Tennyson.

  • All There in the Manual: How there is even a second Omnitrix is explained in the pop-up edition of Ken 10: Ben 10,000 simply used his smartest aliens to create one.
  • Ambiguously Brown: In the original series.
  • Brought Down to Normal: He used to have an Omnitrix, but Ben and Kai took it from him when he was grounded. Then he was given a time travelling device by Paradox and became Spanner.
  • The Cameo: Has a silent one in Omniverse
  • Cool Pet: Got one of his Aunt Gwen's Stone creatures for his 10th birthday.
  • Did You Just Punch Out Cthulhu?: Helps bring down Kevin 11,000 with a set of defensive aliens and only a day's worth of experience.
  • Foil: While, as noted below, he acts a lot like his dad there are some key differences between Kenny and Ben: Kenny is far more tactical in his use of aliens than Ben was thanks to years watching his dad use them. He's also more appreciative of that kind of alien: his disappointment is more in not getting to pick his own aliens and the fact he has no offensive aliens than the aliens themselves (outside of Toepick), and He has a circle of friends, something ten year old Ben notably lacked.
  • Gadgeteer Genius: He used Grey Matter to hack his Omnitrix, and unlock Master Control.
  • Generation Xerox: Acts just like dear old dad did at that age. His relationship with Devlin Levin also mirrors his dad's initial interactions with Devlin's dad Kevin.
  • The Ghost: Snakepit, Sandbox and Shellhead
  • Hot-Blooded
  • I Just Want to Be Special: Really just wants to be a hero like his dad but Ben begins Kenny's career by protecting him at every turn rather than let Ken make his own mistakes.
  • Instant Expert: Is already fairly skilled with his aliens after less than a day of superheroing and with his father specifically trying to keep him out of harms way. Justified as he seems to have a detailed knowledge of his dad's aliens.
  • Jumped at the Call: Had been chomping at the bit to join his dad in the hero business.
  • Kid Hero: Like father like son.
  • Race Lift: In the original series, he had the skin tone of his mother, Kai. In Omniverse, he had his father's skin tone in a brief cameo. When he returns later, he has Kai's skin tone again.
  • Stone Wall: Shellhead, one of his unseen aliens who according to Ken his only power is being invincible.
  • Strong Family Resemblance: To both his parents, having his father's looks but his mother's skin tone.
  • Unwitting Pawn: Devin Levin uses him to get to his dad.
  • Weak, but Skilled: Ben put mostly defensive or skill based aliens in his Omnitrix. He makes up for his skill and creativity with them. Becomes even more apparent when he uses grey matter to unlock master control.
  • What the Hell, Hero?: Isn't pleased with his dad constantly babying him.

No Watch Ben

Voiced by: Yuri Lowenthal

An alternate Ben introduced in "And Then There Were None", from a universe where there never was an Omnitrix.

  • Badass Normal: Seems to be his future path, specifically as a Plumber.
  • Establishing Character Moment: Most of the first half of "And Then There Were None" highlights the similarities and differences between Prime!Ben and him: He is seen helping an old lady get her cat out of a tree, finding the town he lives in boring, desiring more, having an awkward relationship with his cousin (since without discovering the Omnitrix, they never became friends), and seems to have a friendly relationship with Cash and JT rather than the same one as Prime!Ben.
  • NaÔve Newcomer: Spends the second act of "And Then There Were None" terrified and confused by the Omnitrix wielders until Paradox explains things.
  • Nice Guy: He is far less egotistical and self-centered than the regular Ben, presumably due to never becoming famous.
  • Screams Like a Little Girl: When the regular Ben transforms into Spider Monkey, and when he's being carried away by him.

Ben 23

Voiced by Tara Strong

An alternate version of Ben, whose own version of Grandpa Max died shortly before he received the Omnitrix and who thus had to teach himself how to use it. Though still ultimately fashioning himself as a hero, without Max's guidance and teachings this Ben became even more self-centered, amoral and obnoxious than our Ben had ever been, and knows next to nothing about the aliens he meets or turns into, or even about the Omnitrix itself. A worldwide figure, entertainment mogul and hero to millions, he lived a comfortable life milking his heroism for personal gain before an interdimensional meeting with Ben put him on the right track.

  • Aesop Amnesia: Downplayed. He tries to decline a plea for help to save the Multiverse from Vilgax and Evil Bens, still suffering a case of Bystander Syndrome, but goes along with them anyway since it's the right thing to do.
  • Anti-Hero: He's a fame-obsessed annoyance, but he does save the day in the end anyway.
  • Atrocious Alias: His alien names are, for lack of a better word, lame.
  • Blue Eyes
  • Bystander Syndrome: Surprisingly, considering Mainstream Ben's most defining trait of character. He doesn't lift a finger to help people being victimized by non-alien threats, because the press doesn't lap it up as they do when he fights titanic battles against aliens. Ben basically has to drag him into helping take down a bunch of bank robbers, and even so he takes so long trying to call his cameramen in to film the fight that he misses it entirely. What's worse, since the only villain he knows of is "The High Intellectuary" (actually Azmuth, trying to reclaim his Omnitrix), who specifically targets him, which means he only ever protects the public from threats that are only a threat to him in the first place.
  • Catch Phrase: "It's Gyro Time!" Also, calling his villains "haters."
  • Fantastic Racism: Believes all aliens to be monsters, invaders or "haters." He gets better.
  • Fiction 500: He claims to be rich and influential enough to practically run Bellwood, which seems to be have weight in at least some respects.
  • Giver of Lame Names: Pretty much all of his aliens are poorly named, either as a line-of-sight on their appearance and powers or some variation of "[X] Guy/Man". Examples include Freezelizard (Articguana), Electricyeti (Shocksquatch), Charcoal Man (Heatblast), and Plug Man (Feedback). Though he changes Plug Man to Feedback after hearing Ben's name, and Eye Guy has the same name.
  • Jerk with a Heart of Gold: He's obnoxious and sometimes seems to care only about his fame and his image - even at the expense of other people at times - but deep down he really does want to be a hero, and he genuinely respects and looks up to our Ben after meeting him. He is also legitimately receptive to Ben's advice, even when it goes against what he's built his image up to be - though he doesn't really let it sink in until after he nearly kills Azmuth and Ben has to get tough with him. By the end, he comes off more as a misguided kid than the all-out jerk he seems to be.
  • Lonely at the Top: Pointed out by his version of Azmuth when the two finally meet: Ben 23 has money, fame and the adoration of millions, but none of that holds a candle to having Grandpa Max with him - and he still misses him.
  • Miles Gloriosus: Exhibits many traits of this, though he is not a complete example. Though he is a competent and effective hero in his own right, he constantly exaggerates or even lies to make himself look better, particularly in front of his less accomplished but far more heroic alternate version.
  • Obliviously Amoral: Though he certainly wasn't above using the idea to make himself look good, he legitimately had no idea that not all aliens were evil. When Ben tells him so, he's amazed rather than disbelieving. After learning his lesson, he gradually becomes a much better person for it.
  • Palette Swap: His Omnitrix is a blue and gold version of Kid Ben's, and his aliens are blue palette swaps of Ben's.
  • Person As Adjective: He tends to use his own name as slang for "awesome," as in "that was so totally Ben." Given that he uses it when hyping up a crowd, it's likely part of his image.
  • Shadow Archetype: He's still Ben, but without Max to rein in his ego and greed, and lacks the patience, skill, and some of the morals of the main Ben. He gets better, as a result of meeting the main version and working with Azmuth afterward, though does still veer into his questionable morals.
  • Stepford Smiler
  • Trademark Favorite Food: Gyros - literally, as his name is branded all over his favorite franchise. Though when asked about it he dismissively refers to Gyros as "yokel food," possibly implying that his love for them may be just another part of his image.
  • Unskilled, but Strong: Self taught with the Omnitrix, and as such lacks finesse in the way he uses his aliens - in favor of brute force. Unlike the main Ben, though, he can at least consistently pick the transformation he actually wants.
  • Vague Age: It's never stated exactly how old he is, but he appears to be older than Ben's kid self, but younger than his teenage self, meaning he's somewhere between 12 and 16. Wordof God says he's 12-14.

Gwen 10

Voiced by Ashley Johnson

A Gwen Tennyson from an alternate timeline where she got the Omnitrix instead of Ben.

  • Action Girl
  • Ascended Extra: Amusingly enough, she wasn't even technically a character at first; Gwen 10 was an Whaf if?-like Bizarro Episode from the Original Series imagining how things would have gone if Gwen got the Omnitrix instead of Ben. In fact, Gwen didn't even get to keep the Omnitrix at the end of this episode. Comes Omniverse, the concept is used to create an alternate timeline where she actually kept the Omnitrix.
  • Distaff Counterpart: Her alien forms are all female versions of Ben's.
  • Little Miss Badass: Still 10 years old when she appears, and still kicks ass.
  • The Last of These Is Not Like the Others: In And Then There Were None and And Then There Was Ben, she is the only alternate Omnitrix wearer involved in the conflict to to not be Ben in one form of another. Outside of the conflict, she isn't the only one as in one reality Argit among people apparently got hold of the Omnitrix.
  • Palette Swap: Her Omnitrix is the original, but with the same colors as her shirt, and the green has been changed to pink.
  • Took a Level in Kindness: It might just be because of the situation, but compared to mainstream 10-years-old Gwen, she is a lot less abrasive toward the various Ben she teams up with, and while she still snarks at them, it's much less mean-spirited.

Argit 10

Voiced by : N/A
An alternate Argit briefly seen when Paradox is recruiting the alternate Ben's. In his reality, he got the omnitrix. Nothing else is known other than that his Omnitrix is gold and he's filthy rich.

    Tetrax 

Tetrax Shard

Voiced by Dave Fennoy

One of the Bounty Hunters recruited by Vilgax to get the Omnitrix in season 1 of the Original Series. It however later turns out he was actually The Mole and wanted to make sure Vilgax didn't get the Omnitrix. Tetrax actually is a Petrosapien who once accidentally allowed Vilgax to destroy his native planet of Petropia after providing him with the Crystal required to power his weapon. He has then been fighting Vilgax as a way to atone for his crime.

  • The Atoner: he attempts to prevent Vilgax from getting his hands on destructive devices as a way to atone for being the one who provided Vilgax with the crystal that allowed him to destroy Petropia.
  • Badass: he proved more or less an acceptable match to the combined forces of Sixsix and Kraab, and practically Curb Stomped Diamondhead during their first encounter.
  • Beard of Evil: not himself, but his Evil Counterpart from Dimension 23 has one. Subverted in that Dimension 23 Tetrax isn't evil either.
  • Bounty Hunter: Initially, he also worked for Vilgax, but, he's decided to fight against him for what he did to his home planet. By now, he still is a bounty hunter, but he only works for those he consider honest hirers. He seems to work on regular basis for Azmuth.
  • Dark Is Not Evil: yes, the guy dressed in black armor with a helmet is a good guy.
  • Gemstone Assault: well, he is from Diamondhead's species, so yeah. Notably, his suit apparently is built so he won't have to remove it to use his powers.
  • Good Counterpart: to Sixsix in the original series.
  • Hover Board: He has one, which he gave to Ben later. He was also introduced with this as his production name.
  • Identical Stranger: to Diamondhead, especially since aliens of the same race can and often look different (except Highbreeds). Possibly justified considering he was supposely the Last of His Kind at this point, meaning his DNA was most likely used for Diamondhead.
  • It's All About Me: Used to follow this. It bits him in the arses hard, and he gave up on it after that.
  • Last of His Kind: By his own fault. At least until Petropia is restaured by Sugilite.
  • "Reason You Suck" Speech: delivers one to Ben at their first encounter, pointing out Ben's Leeroy Jenkins tendencies and his lack of strategy. Fortunately, Ben was smart enough to learn from this.
  • The Reveal: He wore a helmet hiding his face for most of his first appearance; it wasn't until the last minutes of the episode that he removed it and revealed himself as a Pretrosapiens.
    • It Was His Sled: By now, all fans are well-aware he is a Petrosapiens, and it's hard to not get the information from the fandom before you watch the episode.
  • Throw the Dog a Bone: His planet gets rebuilt with all its population resurrected in Secret of Chromastone thanks to a combination of Chromastone's powers and a failsafe inside the crystal.

    Xylene 

Xylene

Voiced by Grey DeLisle

The alien who was in charge of bringing the Omnitrix to Earth, and one of Max's old Love Interests. She was the one who unlocked Upchuck for Ben.

  • Ace Pilot: In the Original Series' pilote, she manages to shoot at Vilgax while he is still inside his ship, damaging him so much that he has to spend the whole season in a Dark Lord on Life Support situation.
  • Call Back: She gets a mention in Omniverse episode Gone Fishin' as a Continuity Nod.
  • Extra Eyes: She has very exactly three eyes.
  • Green-Skinned Space Babe
  • Love Interest: to Max Tennyson. Apparently, Max has a thing for alien chicks.
  • Maternally Challenged: Xylene's species all a whole, since they don't take care of their offspring once they hatch. She isn't able to understand attachment to children in other species.
  • Non-Mammal Mammaries: An especially blatant case in that she explicitly states her species don't take care of their children at all, making you wonder the point of those.
  • Psychic Powers
  • The Reptilians: Toned down; seeing how she isn't a shapeshifter and isn't evil.
  • Small Role, Big Impact: She only appeared in two episodes, including one where we don't actually see her (only her ship is shown). Yet, she was the character who initiated the whole plot of the franchise.
  • What Happened to the Mouse?: Disappeared entirely after her one appearance (outside of a mention in Omniverse) despite having a key role in Ben's origin, an obvious interest in Max, and a lack of explanation as to why Azmuth chose her to deliver the Omnitrix.

    Verdonna Tennyson 

Verdonna Tennyson

Voiced by Barbara Bain (as an adult), Juliet Landau (young and Anodite forms)

Max's wife, as well as Ben's and Gwen's grandmother. Verdonna is an Anodite, from a specie of alien, Mana-controlling Energy Beings. She is the one Gwen got her affinity with magic from.

  • Badass:
    • Badass Grandma: Literally; she is an actual grandmother, yet was able to handle both Ben, Kevin and later Gwen in a fight at the same time.
    • Badass in Distress: In her backstory, she was this when she met Max for the first time.
  • Blue and Orange Morality: She left her family when she found out none of her direct children had inherited Anodite powers, treated Gwen favorably over Ben because Ben was lacking said powers (though in her defense, she got better on this side), and attempted to destroy Gwen's body to turn her into an Anodite against her will (again, they managed to talk her out of it). She seems to see nothing wrong with all of this.
    • On the other hand, destroying Gwen's body is more or less just peeling a full-body mask off her (which is implied they can put back on).
  • Chuck Cunningham Syndrome: Hasn't appeared in Omniverse so far. Justified due to downplaying Gwen's anodite heritage and Gwen's already severely reduced screen-time.
  • Energy Being: Her real form.
  • I Was Quite a Looker: Her Anodite appearance hasn't changed, but her former human disguise was something to see.
  • Mana: She is made of that stuff.
  • Ninja Pirate Robot Zombie: She is an alien Energy Being with magic-based powers.
  • Rescue Romance: With Max.
  • Sitcom Arch-Nemesis: Apparently to Gwen's mother, her daughter-in-law.

    Jimmy Jones 

Jimmy Jones

Voiced by Scott Menville

A young Child Prodigy who is responsible exposing Ben's identity in Ultimate Alien. A big fan of Ben and his exploits, he was able to deduce after years of investigation that all alien forms were actually one single shapeshifting person. He then made the information public, assuming Ben would enjoy the fame. Though the team was initially unconfortable with this, Ben comes to befriend him, and frequently asks for his help into searching informations.

    Eunice 

Eunice (Unitrix)

Voiced by Molly Quinn

A mysterious girl met by Ben, Gwen and Kevin during vacation. She arrived on Earth in a spacepod, with no memory of who she was beside her name. Ben started developping an attraction to her, when it turned out she was being hunted by Sunder for unknown reasons. It's eventually revealed she was the Unitrix, a pre-Omnitrix prototype developped by Azmuth with the ability to absorb DNA from living beings and stock it inside itself. When arriving on Earth, she assimilated Gwen's DNA (the first person who touched her pod), causing her to turn into a female human. Sunder was actually sent by Azmuth to retrieve her after she had been missing. Though initially indending to turn her back into a device, Azmuth agreed, after a short argument with Ben, to keep her as an assitant instead.

  • Artificial Human: she is actually a Omnitrix-like device created by Azmuth to store DNA, who turned into a girl after scanning Gwen's DNA.
  • The Cameo: Briefly appeared in "The Most Dangerous Game Show".
  • Everyone Loves Blondes: Ben sure does.
  • Friend to All Living Things: one of her abilities.
  • NaÔve Newcomer: in her first appearance; she gets better.
  • Naked on Arrival: The only character to ever show nudity in the series.
  • Love Interest: to Ben in her first appearance. Seems to have got over it by the next time she shows up.
  • Power Copying: her main special ability consist in copying animals' abilities for a limited amount of time through mere contact.
  • Took a Level in Badass: in her first appearance, she was a naive girl who could barely stand a fight. The next time we see her, she can fight toe to toe with Arachnichimp Dnaliens.
  • Shout-Out: the way she arrives on Earth is kinda reminding of Supergirl
  • What Measure Is a Non-Human?: The whole argument between Ben and Azmuth about this: Azmuth considers her not more of a sentient being than any of Ben's transformations and intends to turn her back into the Unitrix to stock her in his lab, while Ben believes she is a real person and must be treated as such. Eventually, Azmuth agrees to keep her in human form as his assistant.

    Ben's Parents 

Carl and Sandra Tennyson

Carl played by Dee Bradley Baker (Original Series, Destroy All Aliens), Don McManus (Race Against Time, Alien Force, Ultimate Alien)
Sandra played by Tara Strong (Original Series, Destroy All Aliens), Beth Littleford (Race Against Time, Alien Force, Ultimate Alien, Omniverse), Vyvam Pham ("Ben 10 Returns, Part 1")

  • Amazingly Embarrassing Parents: Invoked. They're the stereotypical Granola Couple.
  • Canon Immigrant: Added to the cartoon after debuting in Race Against Time.
  • Characterization Marches On: They initially appeared in a What if episode of the Original Show with completely different designs, before being given the movie designs in Alien Force.
  • Cloud Cuckoolander: In Omniverse, Sandra get a visit from Princess Looma trying to deliver her wedding gifts to marry her son; said gifts include Rook, Esther, Julie and one of Fistina's arms. And then Ben and Fistina arrive to fight Looma right at her front door. She spends the entire scene watching this completely insane situation and treating it like if it was completely normal.
  • Doting Parent: Both tend to do this, but Sandra arguably takes it a bit further.
  • Dumb Blonde: Subverted with Sandra; see Obfuscating Stupidity.
  • Hidden Depths: In both the Original Series and Alien Force, it's mentioned Carl resents Max for neglecting the family in favor of Plumbers matter, and, when he learns about the Omnitrix, for involving Ben in it. He gets better.
  • Hippie Parents
  • Lethal Chef: Not really, but Ben doesn't like Sandra's cooking. Rook does, though.
  • Locked Out of the Loop: Excluding a non-canon episode from the Original Series, they didn't learn about Ben's super-heroics until around the middle of Alien Force. They initially reacted badly, but eventually allow Ben's duties as a hero.
  • Obfuscating Stupidity: Alien Force shows they are much smarter than they appear to be; when they find out about Ben's heroics, they easily foil any attempt from him to leave without their knowing or communicate with Kevin and Gwen, eventually forcing him to just transform and force his way out.
  • Odd Friendship: Sandra has one with Ma Vreedle in Omniverse.

    Myaax 

Myaax

Voiced by Vanessa Marshall (Secret of the Omnitrix), Vyvam Pham (Alien Force)

A female Chimera Sui Genesis (Vilgax's species) who worked as Azmuth's assistant and helped him developping the Omnitrix. He refused to give her credit for it though, resulting in her taking her revenge by putting her own signature inside it instead of Azmuth's. During Secret of the Omnitrix, she is found in Incarceon by Ben, Gwen and Tetrax, and helps them find Azmuth. After the universe has been saved, she makes up with Azmuth and become his assistant again.

  • Berserk Button: She takes offense to being mistaken for Vilgax (plus she's a woman, so...)
  • The Cameo: Briefly appears in "The Most Dangerous Game Show".
  • Cthulhumanoid: Just look at her, though she won't drive you insane or anything like that.
  • Cute Monster Girl: Averted with her Original Series look. YMMV if the trope is played straight or not with her Alien Force look, but it definitely is in Omniverse.
  • Genius Bruiser: she is a brillant enough scientist to be Azmuth's assistant; she also is from the same species than Vilgax.
  • My Species Doth Protest Too Much: Chimera Sui Genegis are supposed to be an aggressive, warrior species (proven in the Omniverse episode "Vilgax Must Croak"; they managed to repel a full-scale invasion of their homeworld by the Incurseans in a matter of hours). Myaax, on the other hand, is a self-admitted coward who rather avoids fighting whenever possible.
  • Lovable Coward: More than willing to let a ten-year-old do the fighting.
  • Progressively Prettier: When she was first introduced in Secret of the Omnitrix, she barely had any difference with Vilgax's original appearance, to the point Ben actually mistook her for him. Her cameos in Alien Force and Omniverse gradually despict her as more feminine and more attractive. A strange choice when you consider her initial appearance was very explicit about her looking like Vilgax.
  • Unwitting Pawn: Word of God revealed that she was the one who accepted Zs'Kayr's offer to provide her with DNA samples for the Omnitrix, allowing him to secretly put his own sample amongst them and resulting in Ghostfreak.

    Cash and JT 

Cash and JT

Cash Murray played by Dee Bradley Baker (Original Series), Tyler Patrick Jones (Race Aganist Time), Matt Levin (Alien Force, Ultimate Alien)
JT played by Adam Wylie (Original Series), Tyler Foden (Race Aganist Time), Yuri Lowenthal ("Ben 10 Returns, Part 1"), Scott Menville (Alien Force, Ultimate Alien)

A duo of bullies who used to bother Ben in the original series, typically by hanging him to trees. Once he got the Omnitrix, Ben developed a liking to give them a payback as Xlr8.

    Reinrassic III 

Reinrassic III (Reiny)

Voiced by Richard McGonagle

A Highbreed lord who, following a fight around a portal, accidentally ended up stranded with Ben on a hostile desertic planet. With no other choice, the two had to team up to find their way home and survive. Though initially as racist and aggressive as the others of his kind, Reinrassic progressively befriended Ben, reaching a point where he lost his hand protecting him. Ben reattached it using Swampfire's regenerative abilities, but this altered Reinrassic's DNA in the process. This, plus the realization that he had been infected by Ben's human emotions, led Reinrassic to exile himself on the planet, feeling he would no longer be welcome among his people. He eventually came to realize this was actually a way to save his species, and returned his home world just in time to convince them not to commit mass suicide after Ben altered their DNA. Impressed by his lucidity, his people then named him Highbreed Supreme, and he stopped the war, then concentrating his efforts in reintegrating his species to the universe.

  • Badass: was forced to team up with Ben on a planet where climate was weakening him (Highbreeds survive better in cold climate) with limited supplies of water. He still survived. Even after Ben left, he still found a way to come back on his homeworld of his own.
  • Complaining About Rescues They Don't Like: During his episode, Ben at one point saves him from a swarm of killer bugs by grabbing his arm as Swampfire. Once the danger is passed, he immediatly starts yelling about how Ben dared touch him. Ben even calls him out for it.
  • Enemy Mine: with Ben. Unlike the usual example, it sticks.
  • Fantastic Racism: initially, like all Highbreeds. He gets better.
  • Fire-Forged Friends: with Ben.
  • Humanity Is Infectious: his whole first appearance revolves around this trope; deconstructed when he decides to stay exiled because he feels like he was corrupted. Then reconstructed when he realizes the truth and convinces the other Highbreeds of the error of their way.
  • Hypocritical Humor: When offered by Ben to join him around the campfire and talk, he dismisses the idea as pointless and essentially says he doesn't want to talk. Very next minute, Ben gives him his name, and he answers by listing all his name, titles, lineage and others until Ben interrupts him.
  • I Choose to Stay
  • Literal-Minded: a minor case; he refers to Ben as Ben-Ben Tennyson due to Ben introducing himself as "Ben, Ben Tennyson". Other than that, he is perfectly able to understand expressions.
  • My Species Doth Protest Too Much: averted; when first introduced, he was as arrogant and racist as any other Highbreed; it's only after befriending Ben that he became a better person. And when he came back on his planet, he successfully convinced his people to share his opinion.
  • Overly Long Name: his complete name is Reinrassic III, seventh son of the Noble Highbreed House of Deralla, direct descendant of the Pure Blooded High Order of Rarsect. Ben goes with just calling him Reiny.
  • Red Right Hand: Inverted; after he lost his hand saving Ben from a local predator, Ben uses Swampfire's regenerative abilities to heal his wound, leaving him with a green hand... only he it's when they have befriended, so this is basically a sign he is a good guy.
  • Stab the Scorpion: How he saves Ben at one point in Alone Together.
  • Took a Level in Kindness: Starts out as a generic racist Highbreed, but he and Ben eventually become Fire-Forged Friends, and he ends up convincing his entire people to give up the racist way.
  • You Have Outlived Your Usefulness: Subverted; he makes it very clear to Ben he intends to apply this trope on him once they no longer need to collaborate, but they end up genuinely befriending each others.

    Argit 

Argit

Voiced by Alexander Polinsky

One of Kevin's friends and former partners-in-crime. Argit is an porcupine-like alien Con Man who is usually seen attempting to make profit from any situation he can find, though he usually is harmless enough to not be considered by the main cast as a threat. Though he frequently double-cross Kevin in their deal, Kevin still considers him as a friend and frequently talks with him.

  • Affably Evil: He always acts friendly toward both Kevin, Ben, Gwen and Rook when he sees them, but he usually won't hesitate to double-cross them if he can save his skin or make profit by doing so.
  • Barefoot Cartoon Alien
  • Bullying a Dragon: in "Andreas' Fault", he started trying to blackmail a Forever Knights castle with the help of Andreas. This worked for a short while due to the Diminishing Villain Threat they were suffering at the time, then a superior was sent to put some order...
  • Chronic Backstabbing Disorder: And how. Gwen describes him as "A con man who would sell his mother for lunch money" (According to Kevin's answer, he actually did it, and got a top price from her).
    • This becomes a point of Hypocritical Humor when he accuses the Incurseans for double-crossing him in bargaining for the Annihilarg.
  • Con Man
  • Cornered Rattlesnake: As he himself says, he's only a threat when he's backed against the wall.
  • Crouching Moron, Hidden Badass: It was out of fear, but he did defeat one of Dr. Psychobos's mutant T'okustars by shooting all of his quills at it. He also defeated Albedo as Ultimate Spidermonkey.
  • Diminishing Villain Threat: In his first appearance, he was portrayed as an actual villain who, while not exactly a big threat, was still dangerous enough for Ben to require using Echo Echo against him. In all his following appearance, he was portrayed as more comical character who would fail anyway, to the point he can no longer be classified as an antagonist by now. See Harmless Villain.
  • Dirty Coward: He can and will fight if really forced to, but he is in no way a fighter, and will usually either try to run away as much as possible or just backstab his opponents, or just ask the Plumbers/the main cast for protection.
  • The Dog Bites Back: He constantly tricks and double-cross Kevin, while still trying to act like his friend. In Ultimate Alien, a psychotic Kevin starts chasing him to get revenge on all the times he double-crossed him by the past.
  • Even Evil Has Standards: In "The Ultimate Heist", he's not impressed when he hears that Rook has been trying to change Ben:
    Argit: Even I know you don't try to change a partner.
  • Extreme Omnivore: In "Cough It Up", he swallows the episode's MacGuffin for safekeeping. Not an example in itself, but when he's finally made to...well, cough it up, he also coughs up a bunch of other objects that he apparently ate just because he was hungry.
  • Harmless Villain: in-story, he is technically a criminal, but the protagonists leave him free both because he is a friend of Kevin and because he isn't much of a threat.
  • Hoist by His Own Petard: His plans have a bad tendency to systematically backfire on him.
  • Jerkass
    • Jerk with a Heart of Jerk: when Andreas apparently sacrifices himself to save him and the heroes, Argit appears to be honestly desperate... only to reveal he is actually mourning all the money he lost in the process. Kevin is not amused.
  • Karma Houdini: He constantly double-crosses Kevin and others, has manipulated poor Andreas into doing his bidding (and shows no true remorse when this apparently leads to Andreas' death), and betrayed the rebellion to the Inkurean invaders. The worst retribution he has ended up with was to be sent in prison a couple of times, only to be free again by the next episode. He never truly gets punished, and Kevin keeps trusting him. Even worse after Frogs of War, where he actually managed to pass himself as a hero and became famous and loved by Undertown's population. Oh, and in A New Dawn, it's revealed he will end up President of Earth in the future.
  • Lovable Rogue/Lovable Traitor: he is a unscrupulous rogue who will betray everyone for his own benefit, but he gets away with that in the eyes of some fans due to being hilarious.
    • Though some parts still make him overlap with just being an obnoxious Jerk Ass, such as when he remorselessly manipulated Andreas to his own end, when he betrayed the rebellion to Attea during the Inkursean invasion, or when he was willing to sell a baby to be eaten.
  • Manipulative Bastard: Acted like one toward Andreas. Though not an especially competent one, and it's pretty clear it worked only because Andreas wasn't the smartest.
  • Not Quite Dead: An actual ability of his race; they possess the ability to temporarly stop their pulse to fake death. According to Ben, this is the only explanation to the fact such an obnoxious specie was able to survive that long.
  • Our Presidents Are Different: In "So Glad We Had This Time Together", which takes place in Ben 10,000's time, it's revealed that Argit has become President of Earth.
  • Petting Zoo People: A hybrid rodent of sorts.
  • Pet the Dog: He actually tries to warn Ben about what will happen if he defeats Looma in "Many Happy Returns", but is silenced by Kevin.
    • In The Ultimate Heist, he saves Ben by defeating Albedo, even though he could have easily fled and left him to his fate. Granted, he still tries to make profit of it after that, but it's still worth noticing.
    • In Weapon XI, when the heroes wonder whether Kevin, who was revealed to be a sleeper agent of the Rooters, ever truly meant to be their friend, Argit is the one who repeatedly and honestly insists that they believe that there's still good in him, even saying that they all owe it to Kevin to give him a chance. Granted, he tries to use himself as a similar example, which doesn't exactly help his case...
    • Also, in a flashback, a young Argit saves the Tennyson family's lives from a psychotic Kevin.
  • Prickly Porcupine
  • Rewarded as a Traitor Deserves: Gets on the receiving end of a non-lethal version in Frogs of War when he betrays the resistance to Attea.
  • Spike Shooter: Can launch spikes from his body, which are capable to knocking out whatever they hit.
  • Villain with Good Publicity: In Omniverse, thanks to the fame he got from defeating a Way Bad during the Inkursean Invasion, he becomes a hero to the population of Undertown and creates his own enterprise, while still pursuing his illegal alien tech trade on a larger scale than before. He still remains fairly harmless though.

    Baz-El 

Baz-El

Voiced by Rob Paulsen
The Galvanic Mecamorph who spawned Ship.

  • Asteroids Monster: Notably spawning a regular character, Ship.
  • British Accent
  • Jerk with a Heart of Gold: Despite offering Ship to Ben and Julie in his first appearance, he attempts to take it back later just so he could get some credit for Ben's victory in the Highbreed war. He however accepts to give up on him when he sees that Julie and Ship have bonded. Later, when Julie tries to give him Ship back because she fears it likes him more, he voluntary acts like a jerk so Ship will go back to her.
    • Jerk with a Heart of Jerk: In his third appearance, he was going to sell Ship on the black market, even though Ship is technically his son.
  • Too Dumb to Live: twice; in his second appearance, he recruited the Vreedle Brothers to bring Ship back alive. In his third appearance, while he is at the mercy of a bunch of fanatical alien mystics who accuse him to have profaned their sacred place, he outright tell them said sacred place is a mess to the point he thought it was just old ruins.
  • Small Role, Big Impact: See Asteroids Monster.

    Andromeda Five 

The Andromeda Five

Bivalvan voiced by Dee Bradley Baker
P'andor voiced by Dee Bradley Baker
Andreas voiced by Dee Bradley Baker
Ra'ad voiced by Dee Bradley Baker
Galapagus voiced by John DiMaggio

The Andromeda Five are, as suggested by their name, five alien of different species from the Andromeda Galaxy. All of them had in common that they possessed the powers Osmosian criminal Aggregor required to absorb in order to get the abilities he needed for his scheme. As a result, all of them were kidnapped by him so he could take them to his planet, where he would have use a machine to absorb them permanantly (instead of the usual temporary 10% of their actual powers). They succeeded in escaping during the travel, and ended up on Earth, where they splitted up so they could better escape to Aggregor. The first half of season 1 in Ultimate Alien focus on Ben's team trying to help them go back home, causing Ben to scan all of them in the process. They included:

    Kwarrel 

Kwarrel

An old Alien prisonner Kevin met during his time in Incarceon. Kwarrel played a major part in Kevin's life by taking him under his wings, helping him to turn back to his human form and learning him a safe way to use his power, such allowing him to go on the parth of redemption. Unfortunately, he died killed by prison guard Morgg while helping Kevin to escape the Null Void.

  • Badass
  • Cool Old Guy: He was such a nice and cool guy that you have to wonder why he ended up in prison in the first place.
    • Dwayne McDuffie says that Kwarrel lived a full life and didn't reveal what caused him to end up in the Null Void, but hinted that "it was bad".
  • Gentle Giant
  • Heroic Sacrifice: Gave his life to keep Morgg busy and allow Kevin to escape Incarceon.
  • Mentor Occupational Hazard
  • The Obi-Wan: to Kevin. He was the one who helped him to get rid of his psychosis and original mutant form, as well as teach him how to use his new powers.
  • Posthumous Character: His first and so far only appearance was in season 1 of Ultimate Alien; he actually died in the gap between the original series and Alien Force.
  • Small Role, Big Impact: A Posthumous Character who only appeared in one episode in a flashback, but he was the one who cured Kevin of his insanity, making him a key factor of his Heel-Face Turn. He and his role in Kevin's backstory is noticeably one of the few elements not retconned in Omniverse.

    Jennifer Nocturne 

Jennifer Nocturne

Voiced by Tara Platt

  • The Cameo: Briefly appears in "The Most Dangerous Game Show."
  • Celebrity Is Overrated: You have no idea...
  • Everyone Loves Blondes
  • Expy: of Kristen Stewart in her first appearance (or more accurately, of her role as Bella in the Twilight movies)
  • Fallen Princess
  • Hidden Depths: She was initially introduced as a shallow character serving as a reference to Twilight and a potential rival to Julie for Ben's affection. Her second appearance explores her further, revealing she had a harsh childhood, suffers a major lack of affection and is subject to a Stockholm Syndrome. Much like Captain Nemesis, Omniverse undoes this, and she's back to being a ditzy actress.
  • Important Haircut
  • Parental Neglect: The reason why she ran away to become a celebrity.
  • Retcon: In "The Most Dangerous Game Show," her hair is back to it's original color and length, and her movie career is still going (Lending further credence to the fan theory that the events of "Catch A Falling Star" never happened).
  • Romantic False Lead: to Ben, sort of. It was actually very short, and it was quite obvious Ben didn't really love her; he actually wasn't even considering their relationship as a date, believing him spending time with her was platonic and doing it because it was apparently good for their image.
  • So Beautiful, It's a Curse
  • Stockholm Syndrome: toward Captain Nemesis. She even has an affair with him. A rare animated example that is not played for laughs.

    Elena Valadis 

Elena Valadis

Played by Alyssa Diaz (Alien Swarm) Tia Texada (Ultimate Alien)

A character introduced in the Ben 10: Alien Swarm movie. Elena was one of Ben's Childhood Friends when he was 13, and Ben's first crush (apparently excluding Kai Green). She comes back during Alien Swarm, where it's revealed her father was a Plumber who studied the Hive's nanochip.

    Colonel Rozum 

Colonel Rozum

Voiced by John DiMaggio

A military officer first introduced in Ben 10: Ultimate Alien who serves as the protagonists' main contact with the Army over the course of the show.

  • Beneath the Mask: the few first times we see him, he is portrayed as a rather reasonable person by military standards in fiction, accepting the protagonists' help and fully cooperating with them (though he does display some more aggressive tendencies when he suggested to nuke the place where Aggregor was hiding). We only get to learn about his Knight Templar tendencies in Prisonner 775 is missing.
  • Broken Pedestal: seems to be this to Max when we find out about his Knight Templar tendencies.
  • Expy: of General Thunderbolt Ross, or at least his Expy General Eiling.
  • I Did What I Had to Do: his justification for what he did in Area 51.
  • Karma Houdini: he gets away with his imprisonment of aliens with nothing else than having his family threatened by one of his vindicative prisoners. To make things worst, this still wasn't enough for him to learn his lesson.
  • Knight Templar: He imprisoned over 700 alien in Area 51 because they "might" become a threat to Earth.
  • Reasonable Authority Figure: appears to be this at first; flashbacks suggest he might have been one to Max in his youth.
  • What the Hell, Hero?: Max calls him out on his actions in "Prisoner Number 775 is Missing".

    Professor Hokestar 

Professor Blarney Hokestar

Voiced by Charlie Adler

An alien Con Man introduced in Ben 10: Omniverse. Infamous but pretty harmless, Hokestar is constantly looking for a way to make profit through his inventions, usually with mixed results.

  • Gadgeteer Genius: not a very competent one, but still, he is good enough to build a dimension travel machine, so he has to possess some skills.
  • Large Ham
  • Lovable Rogue: his integrity hardly is higher than Argit, but he is pretty much harmless.
  • Meaningful Name
  • Multi-Armed and Dangerous: subverted; he does have multiple arms, but he could hardly be any less dangerous.
  • Snake Oil Salesman: big time.
    • Initially, anyway; ever since Store 23, he seems to be running his interdimensional Mr Smoothie as a legitimate business!

    Esther 

Esther

Voiced by Tara Platt

A character introduced in Ben 10: Omniverse. A hybrid of human and a specie of Rubber Man aliens known as the Kraaho that founded a village under Bellwood. Since Kraaho are from a volcanic planet, they were uncomfortable with Earth's climate, and attempted to use a nuclear device to change Earth's athmosphere and make it more appropriate for them. They didn't care what would happen to the everyone else. Esther disagreed and ended up helping Ben deal with them. By the end of the episode she elected their leader, thus ensuring they wouldn't try that again.

  • Action Girl: She was competent enough to give Ben a run for his money when he chased her.
  • Badass In Charge: After her first appearance, she is appointed The Leader of the Kraaho.
  • Betty and Veronica: She's the Betty to Kai's Veronica.
  • Challenging the Chief: This is how the Kraaho leader is elected but there doesn't have to be a formal challenge; Esther did so unintentionally. "The Kraaho Way is whatever you say it is."
  • Clingy Jealous Girl: In "Fight at the Museum", after meeting Kai. By the end though, in a twist of Irony, she's bonded with Kai to glare at Ben for not comforting Kai when she's crying, prompting her to wrap an arm around her instead.
  • Cute Monster Girl: Justified, since she is half-human.
  • The Cutie
  • Green-Skinned Space Babe: Esther is Ben's first mutual alien Love Interest. She also happens to look exactly like a human save for her light purple skin and her eyebrows.
  • Half-Human Hybrid: Half-human, half-Kraaho.
  • Human Mom Nonhuman Dad
  • Love Interest: To Ben, who she obviously has the hots for. "Rules of Engagement" reveals that Ben and Julie have broken up, leaving Esther as the most likely new love interest.
  • Official Couple: Played with; it's confirmed they have been on dates at least twice, and it is clear Esther considers their relationship as such. Ben, however, is shown to be almost completely oblivious to any form of romantic advances Esther tries. In "Most Dangerous Game Show", she's finally had enough and ditches Ben for Antonio.
  • Purple Eyes
  • Replacement Love Interest: She replaces Julie as Ben's Love Interest, though unlike Julie, they aren't explicitly stated to be in a relationship; Return to Forever and Catfight confirm they do go to watch movies together, but Ben constantly refuses to acknowledge they are more than friends, and any advance she tries goes completely unnoticed.
  • Romantic False Lead: In the current timeline, Ben ends up married to Kai. Having Spanner blurt this out was awkward, to say the least.
  • Rose-Haired Sweetie: Warm and passionate type.
  • Rubber Man: She got it from her Kraaho side.
  • Satellite Love Interest: Much like Julie, she has no major role beyond being Benís girlfriend; her one storyline is solved right in her first episode, and she never appears after that outside of episodes about Ben's love life.
  • Ship Sinking: Ben ends up with Kai, and in "Most Dangerous Game Show", it's revealed that Ester is now dating Sunny's ex-boyfriend, Antonio.
  • Superpower Lottery: Full-blooded Kraaho require constant high temperatures to survive, such that they are living deep underground near a thermal vent and still need cold weather gear. Half-blooded Ester can move around the surface just fine with a warm jacket, and still has their Rubber Man powers.
  • Tomboy and Girly Girl: Girly-Girl to Kai's Tomboy.
  • You Can't Fight Fate: Her reason for breaking things off with Ben; she still likes him, but she knows that him and Kai are meant to be together.

    Ignacius Baumann 

Ignacius Baumann

Voiced by Richard Doyle (Ultimate Alien), Corey Burton (Omniverse)

Ben's next-door neighbor, and the owner of a local grocery store in Bellwood.

  • A Day in the Spotlight: "The Ballard of Mr Baumann"
  • Ascended Extra: Appeared once in Ultimate Alien, hiding aliens from the Forever Knights. He appears more often in Omniverse (though with a completely different look and attitude).
  • Butt Monkey: When Pakmar isn't there to get his property damaged by Ben's Destructive Savior tendencies, Baumann is the one who get it in the face.
  • Characterization Marches On: He was friendly to Ben and his team in Ultimate Alien. In Omniverse, he's much more of a Jerkass, hating Ben for accidentally destroying his car and trashing his store while fighting aliens.
    • Even his appearance has completely changed. When first introduced, he look like this. Omniverse gives him the look shown on this page.
  • Cranky Neighbor
  • Disproportionate Retribution: Makes Ben pay off the damage to his car by doing deliveries, even though the damage was the result of an unprovoked alien attack.
  • Expy: A cranky old neighbor who hates the well meaning but michevious and clumsy kid next door for breaking his things all the time and shouts his tormentors name reguarly? Hmm now where have I seen that before? For an added bonus, Five Year Old Ben wears over-alls.
  • Fourth Date Marriage: With Sheelane, technically third time they met and their second date. Though it is eleven years between meeting and getting married.
  • Jerkass: Granted, Ben did wreck his car several times, but it always was an accident, and he apologized each time. However, a flashback involving the first time him and Ben met shows that he was never nice to Ben in the first place despite being a kid and most of the accidents being fairly harmless (seriously knocking over a stack of lima bean cans warrants a ledger?).
  • Interspecies Romance: "The Ballad of Mr. Baumann" reveals that he's been romantically involved with a mermaid-like alien named Sheelane since Ben was 5 years old.
  • Happily Married: "The Ballad of Mr. Baumann" ends with him asking Sheelane to marry him. She accepts.
  • May-December Romance: Baumann looks to be in his 50's while Sheelane looks much younger, though she is an alien mermaid so who knows how old she actually is.
  • Pet the Dog: In Ultimate Alien he hides aliens from the forever Knights, in "Frogs of War" he hides the resistance in his basement.
    • He actually lets Ben do something for him at the end of "The Ballad of Mr. Bauman" at least somewhat recognizing that he means well.
  • The Precious, Precious Car: His store.
  • Throw the Dog a Bone: He gets to be involved with a hot alien mermaid woman "The Ballad of Mr. Baumann", fair payback for all the trouble Ben's put him through.
  • Too Dumb to Live: In "T.G.I.S.", he tries to prevent Ben from transforming and wrecking his store... while Dr Animo's minions are already wrecking his store, not to mention aggressing his customers.
  • Took a Level in Jerkass: In Omnivese
  • Ugly Guy, Hot Wife: Baumann is an old, overweight, balding man, married to a pretty, young looking, mermaid girl. Lampshaded by 11-year-old Ben, who's more disturbed that said mermaid would find him attractive.
  • Ungrateful Bastard: Admittedly, he has been dealing with Ben's destructive habits for a very long time.

    Pakmar 

Pakmar

Voiced by Tara Strong

An alien trader working in Bellwood who regularly becomes a victim of Ben's clumsiness.

  • Butt Monkey: When Baumann isn't there to fill the role. Meaning quite often.
  • The Chew Toy
  • Evil Counterpart: Mad Pakmar, Mad Ben's Pakmar, whose thanks to Ben owns the only source of water and lords it over the slaves. Ben of course ruins that.
  • Hair-Trigger Temper: Though in his defense, anyone would have this in his situation.
  • Laser-Guided Karma: Mad Pakmar's water business gets destroyed thanks to Ben and Ben 23, and said water is distributed to the people he'd been profiting from.
  • Long List: He produces a list of property damages that is at least ten feet long when bringing his grievances to Max Tennyson.
  • Oh, Crap: His reaction practically every time Ben shows up. Biggest exemple being in "Showdown, Part 1":
    Pakmar: (recognizes Ben as Heatblast) Ben Tennyson?! NOOOOOOOOOOOOOOO! (tries to run away)
  • Jerkass: Definitely. He always acts jerkish towards Ben every time he sets foot in his store. His counterpart in Mad Ben's world however, is an even bigger jerk, taking water and throwing it away right in front of dehydrated prisoners. Ben is happy he finally gets to knock down Pakmar, even if he isn't the same one from his world.
  • Massive Numbered Siblings: He has hundreds of children.
  • Properly Paranoid: He automatically assumes Ben will damage his property in some manner, and Ben never disappoints.
  • Recurring Extra: He has few to no relation to the plot of any episode he appears; most of the time he only is there to get his property accidentally damaged by Ben and remind us how clumsy Ben can be.
  • Spiteful Spit: Occasionally spits on the ground while talking to Ben. He does not like the kid.
  • Third-Person Person
  • Why Do You Keep Changing Jobs?: Each time he appears, he has a new business. Justified because Ben keeps ruining the last one.

    Pax 

Pax

Voiced by Eric Bauza

Pax is a Florauna (Wildvine's species), and an alien rights activist. He acts and dresses like a stereotypical hippie.

  • Animal Wrongs Group
  • Chuck Cunningham Syndrome: He seems to have completely disappeared from Omniverse after "Rad".
  • Good Thing You Can Heal: He's graphically blown up twice (and gets his head bitten off once), but it's alright because he's just a plant creature, and he regenerates.
  • Green Thumb
  • Healing Factor
  • Hypocrite: Rook calls him out in his second appearance, he's concerned for the safety of the creature, but cares not for the other people in the ship who could be killed. He states that Pax put's the freedom of the creature over their freedom, when he's supposed to be fighting for everyone's rights. Pax didn't hear any of it because he was cleaning his ear(?), and wasn't paying attention.
  • Knight Templar: Wants to release dangerous and potentially deadly creatures at the cost of everyone's safety, believe he's doing the right thing, Ben states that's what makes him more dangerous.
  • New-Age Retro Hippie
  • Sitcom Arch-Nemesis: Rook hates him and gets increasingly irritated the longer he has to deal with Pax.
  • Too Dumb to Live: Has twice freed highly dangerous aliens that would either have destroyed the planet or torn him apart and then had the nerve to try and stop people from putting them back.

    Rook's Family 

Rook's Family

Rook Da voiced by Eric Bauza
Rook Bralla voiced by Kimberly Brooks
Rook Shar voiced by Alanna Ubach
Rook Shim voiced by Tara Strong
Rook Shi voiced by nobody
Rook Ben voiced by Alanna Ubach

Rook's father, mother, and siblings.

  • Flat Character: Bralla and Shim don't speak much, and Shi hasn't spoken at all, so their personalities aren't as developed as Da, Shar, or Ben's.
  • Jerkass: Rook Da, at first.
  • Named After Somebody Famous: Rook Ben named himself after Ben.
  • No Name Given: Rook Ben was previously simply known as "Young One", because he had not gone through his naming yet.
  • Took a Level in Kindness: Rook Da eventually comes to accept his son's choice of becoming a Plumber, allows his daughter to become one as well and even stands up to Kundo when the old master tries to stop them, getting hurt in the process. A stark change from his attitude in earlier episodes.
  • The Voiceless: Shi has never spoken.

    Zed 

Zed

Voiced by Paul Eiding

Zed is an Anubian Baskurr, and Khyber's former pet. After Khyber abandons her, she becomes Kevin's pet.

  • Canine Companion
  • Evil-Detecting Dog: In "Mystery, Incorporeal", she's shown to be suspicious of Dante. Turns out he's actually Michael Morningstar in disguise.
  • Heel-Face Turn
  • Loyal Animal Companion: Was this to Khyber, or so it seemed; she obeyed the sound of Khyber whistling, which Azmuth managed to use to turn her against him. Played straight after she becomes Kevin's pet.
  • No Name Given: Her name was not revealed until the credits of The Frogs of War. Khyber only saw her as a hunting tool, and didn't care about her enough to name her. She is finally referred to by name in For a Few Brains More.
  • Samus is a Girl: Prior to the reveal, everyone assumed that she was a male, even Khyber himself. Kevin corrects Khyber on this in For a Few Brains More.
    Khyber: If you feed him, you'll dull his hunting instinct.
    Kevin: Zed's a girl, you jerk!
  • Satellite Character: Justified, as she's a non-sapient pet.
  • Shapeshifting: Used to be able to do this, thanks to the Nemetrix.
  • Team Pet

     Rad Dudesman 

Voiced by Carlos Alazraqui

A mercenary and intergalactic smuggler, who will take on any job and transport any cargo so long as he's paid well.

  • Anti-Hero: Being a mercenary and smuggler, he'll work for anyone who pays him well enough.
  • Awesome McCoolname: See Metaphor Is My Middle Name.
  • Badass: Stated to be one of the best and toughest mercenaries in the Galaxy.
  • Cool Ship: The Lovely Duck.
  • Disproportionate Retribution: Not talking to Ben, throwing Ben out the airlock, punching Ben in the face, all over Ben breaking a part and later using his ship to save his ass.
  • Early-Bird Cameo: Literally. He made a cameo in "Have I Got A Deal For You" before properly debuting in "Rad".
  • Expecting Someone Taller: When he's introduced to Ben, he says that he thought Ben would be taller. It's funny because Ben was Diamondhead at the time, and even in his human form, he's still much taller than Rad.
  • Expy: He's basically Han Solo as a duck.
  • Gatling Good: Pulls out some arm-mounted gatling lasers in "Rad Monster Party".
  • Killer Rabbit
  • Metaphor Is My Middle Name: In "Rad", he first claims that his middle name is trouble, then danger, then profit. Ben naturally doesn't buy it, and until Rook looks up some information on him, revealing that his full name really is "Captain Rad Profit Danger Trouble Dudesman".
  • Morally Ambiguous Ducktorate: For a duck, he's a tough and a scary smuggler.
  • Only in It for the Money: Rook tried appealing to his conscience, which didn't work. Then he threatened not to pay him, which did.
  • Petting Zoo Person: Aside from flying in "The Vampire Strikes Back", he doesn't really do anything duck-like.
  • Took a Level in Jerkass: In his first appearance, he already acted trigger-happy and hot-blooded, but was otherwise fairly easygoing and cool to get along with. In the Galactic Monsters arc however, he became cold-hearted and uncaring, just because Ben fouled up once. When Ben had practical concerns like incomplete repairs or an Omnitrix that won't work without being within collection range of a new DNA sample, Rad doesn't care BS about it. Furthermore, he even cuts off Scout while he was thanking them on radio.
  • Ungrateful Bastard: After Ben saved everyone from Transyl's control, Rad punched him in the face (because Ben had used The Lovely Duck to smash into Zs'Skayr's castle).
  • The Unintelligible: His ship's AI, Pyxi, who can only be understood by Rad himself, and Grey Matter.
  • Token Evil Teammate: He'll help the heroes when they need him, but he doesn't care for anyone but himself or money.

     Spanner 

Voiced by Scott Menville
A mysterious character who first appears in "Something Zombozo This Way Comes". He occasionally assists Ben, but also takes off with various artifacts after helping. He is actually Ken Tennyson, future son of Ben Tennyson and Kai Green.

  • Ascended Fanboy: He really admires Ben and loves the fact that he's working with him in "Animo Crackers". That's because he's his son.
  • Expy: He has a number of traits borrowed from Tokusatsu heroes, such as a buglike helmet and scarf.
  • Future Badass: He's from Ben 10,000's time.
  • Mythology Gag: Word of God is that he's partially designed after Ultra Ben.
  • Punny Name: Get it? Spanner? As in Spanner in the Works?
  • Red Herring: "Cough It Up" plays with the idea he might be Jimmy Jones. "Fight at the Museum" confirms he is from Ben 10,000's time, thus discarding that theory. In actuality, he's Ken Tennyson.
  • Shipper on Deck: For Ben and Kai, on account of them being married in his time. He's actually their son, making that issue a tad more personal for him.
  • Significant Double Casting: Again, he and Kenny share a voice actor because he is Kenny.

     Skurd 

Voiced by David Kaye

Skurd is a Slimebiote, a DNA parasite who can absorb and use the powers of his host. Though he initially works with Khyber, he abandons him in favor of the superior power of Ben and his Omnitrix.

  • Arm Cannon/Blade Below the Shoulder: He manifests powers by either growing an extra arm or forming one from another alien form over an existing one.
  • British Accent
  • Clingy MacGuffin: He boasts of being impossible to remove unless he wishes to leave. This is eventually proven wrong as he can be removed through ionic surgery.
  • Deadpan Snarker
  • Eleventh Hour Ranger: He's introduced at the beginning of Omniverse's eighth and final arc.
  • Equippable Ally: His usual method of helping in a fight is to make a weapon from one of Ben's aliens; using Diamondhead to make a BFS, building an Arm Cannon out of Blox, and so on.
  • The Fog of Ages: After billions of years, he (And the rest of his species) simply forgot what they existed for.
  • Fusion Dance: Of the composite type; on his own initiative he can mix and match the limbs of Ben's alien forms.
  • Infinity+1 Sword: He finds out about Alien X's DNA being in the Omnitirx and literally creates this (sword and all) to help Ben in the final episode.
  • Kid-Appeal Character: Word of God is that he was added to the show at the request of Bandai, presumably to promote toys/merchandise.
  • Last of His Kind: Possibly; Azmuth says that his species is thought to be extinct. He certainly thought so and realizing that he wasn't definitely had an impact on him.
  • Make Me Wanna Shout: An Echo-Echo megaphone.
  • Mega-Microbes: Is single-celled despite being about the size of a golfball; unless he has a host he cannot survive teleportation.
  • Only in It for the Money: Or DNA; he loves sampling DNA, and agreed to work with Khyber because the Nemetrix provided such a wide array of it as well as an offer of profit from his hunts. As soon as he learned Ben's Omnitrix had an even greater selection, he promptly abandoned Khyber.
    • Took a Level in Kindness: His time around Ben had him develop more of a conscious, especially when Vilgax attacked with Malware's remains.
  • Panspermia: As it turns out his race were the uh...sperm in question the early universe was seeded with.
  • Power Copying: He can copy the DNA of anything he comes into contact with and replicate it on demand, usually producing extra limbs to defend himself. Being attached to the Omnitrix gives him access to Ben's entire arsenal of alien powers.
  • Puppeteer Parasite: Has some degree of control over his host's movements, just enough to jerk them around.
    • Also when Ben needed to talk in Spanish, rather than translating, he made him talk in random Spanish words for For the Lulz.
  • The Symbiote: Of the Mutualism variety.
  • Teeth-Clenched Teamwork: Ben doesn't particularly like Skurd, but there's no way to get him off, and he is rather useful, so he's stuck with him.
    • Reached its climax in Malgax Attacks where Ben finally gets Skurd off with Azmuth's help. However, Vilgax attacks using Malware's remains as an exosuit and being strong enough to defeat Atomix. Ben realizes he needs Skurd and asks him to join up again, admitting they make a good team.
  • Time Abyss: Apparently billions of years old as literally the first species in the universe. In that time he and his people have all but forgotten their initial purpose.
  • Timey-Wimey Ball: Is brought to the creation of the universe to be accepted into an empty slot where he is reintroduced to it as a part of the initial life-seeding process. It's unknown is this is a time loop and he simply forgets in the interim.
  • Whip It Good: He can use Wildvine's DNA to create thorny vine whips for Ben.
    Feedback: I already have tendrils, duh! What am I supposed to do with this?
    Skurd: Whip it, my dear boy! Whip it good!

     Bezel 

Voiced By: Tom Kenny

Bezel is the creator of the charms of Bezel, the most powerful sorcerer in the universe... and the janitor at Gwen's college.

  • Almighty Janitor: He is the janitor of Gwen's college, and the most powerful sorcerer in the world.
  • The Archmage: Is the most powerful sorcerer in the universe.
  • Badass Grandpa:
  • Brilliant but Lazy: Despite being the most powerful sorcerer in the world, he hates using real magic due to the lack of rules, and prefers prestidigitation.
  • Bunny-Ears Lawyer: Is incredibly magically powerful, but very eccentric.
  • Expy: He's Ben 10's version of Mumbo Jumbo from Teen Titans. Of course they're voiced by the same guy.
    • His appearance was also based off of Rincewind from Discworld.
  • The Heavy: His charms have had a major impact on the series.

    The Contemelia 
Fifth-Dimensional beings who are responsible for the creation of the Annihilaarg, and apparently quite fond of playing twisted pranks upon dimensions.

  • Above Good and Evil: They don't have conventional morality, instead seeing things as experiments that interest them. They also don't have a problem with Ben, Rook, or Maltruant onboard their ship and don't even interrupt them when they start fighting, saying they're "observers".
  • Appearance Is in the Eye of the Beholder: Everybody perceives their forms differently, based on things they love. Ben sees them all as Mr. Smoothie, Rook sees them as his father, while Maltruant sees them as... Himself.
  • Benevolent Precursors: Turns out that they may not be as bad as legends say they are, as they are all polite to the people who crashed into their ship, and even invite Ben and Rook to watch the universe be created. They also reveal they create universes with the Anihilaarg as experiments instead of destroy them.