Protagonists | Antagonists | Alien Forms | Other Characters | Other Worlds | Alternate Universes
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Bellwood
Ignacius Baumann
The owner of a store that sells alien groceries.
- Running Gag: His car or store always seems to end up wrecked by Ben. So, Ben eventually arranges for the Autobot Springer to act as Baumann's car since Kevin has yet to make a Ben-proof car yet, as well as keep Baumann company when he isn't visiting Sheelane and prevent villains from getting to the store.
Undertown
Ester
Leader of the Kraaho who live in the hottest spot in Undertown.
- Cute Monster Girl: Justified, since she is half-human.
- Half-Human Hybrid: While Ester's parents are never seen in person and only her dad is ever directly mentioned, it's basically all-but-explicitly stated that Ester's dad was an alien (he was the leader of the Kraaho before Seebik took over) and that her mother was a human.
- Rubber Man: She got it from her Kraaho side.
Pakmar
An alien that runs a store in Undertown.
- Running Gag: As in canon, his store keeps getting wrecked, often by Ben and Makoto being in there.
- Jerkass Has a Point: He has the right to be angry at Ben for (accidentally) wrecking his store many times and at Makoto due to her saying she was the one in charge of keeping Ben from destroying things.
Argit
A rodent-like alien that often swindles people.
- Butt-Monkey: He's often used for jokes in the story, often ending up beaten up or chased.
Chrono Spanner and Chrono Driver
A duo of crime fighters that often appear without notice. In truth, they are the future children of Ben and Makoto, Ken Tennyson and Kokoro Tennyson Tropes Related To Both
- Cool Bike: The two have a pair of bikes that can combine to become a time-traveling flying vehicle.
- Future Badass: They're from Ben 10,000's time who time travel to the past thanks to Paradox.
- Walking Spoiler: It's hard to talk about these two without revealing they're the twin children of Ben and Makoto.
Chrono Spanner
The male of the duo. He's the more tech-savvy of the duo, often using gadgets more often than Chrono Driver. His real identity is Ken Tennyson, the future son of Ben and Makoto and Kokoro's twin brother.
- Red Oni, Blue Oni: The Blue to Driver's Red, often being the calmer of the two in a battle.
- Only Sane Man: He tends to be the one who doesn't try to do random things, focusing on the job more.
Chrono Driver
The female of the duo. She's the heavy hitter of the two, preferring to fight up close and personal. Her real identity is Kokoro Tennyson, the future daughter of Ben and Makoto and Ken's twin sister.
- Cuteness Proximity: She loves cuddling animals and wants to have a pet of her own.
- Obfuscating Stupidity: Comes across as this, being a Genius Ditz with the ditz part more evident.
- Plucky Girl: An outgoing and cheerful attitude, even during a battle.
- Red Oni, Blue Oni: The Red to Spanner's Blue, often being the more boisterous of the duo and more eager to fight than him.
Ultimates
The Ultimate forms of several of Ben's aliens that were given sentience due to a glitch in the Ultimatrix. In General
- Named by the Adaptation: Once they began developing personalities, they each named themselves.
Ultimate Humungousaur
- Offscreen Moment of Awesome: Saved his fellow Ultimates from Khyber before the start of the story.
- Pet the Dog: When he learned of Simon's need for glasses, he goes off to find him a pair.
- Posthumous Character: Died prior to the events of the story.
Frost
The evelvoed Neceofriggian form and de-facto leader of the group.
- The Leader: He often takes command of everyone, coming up with the plans.
Simon
Reverb
The evolved Sonorosian.
- Pungeon Master: He inherited Ben's joking personality, as is quickly made evident in why he'd rather head to Earth than Galvan Mark II.=Because if [the Galvan] hear my jams, I'm worried the whole planet would croak=
Pitstop
The evolved Arburian Pelarota.
Rotwood and Ivor
The evolved Methanosian and his pet goat.
