Ben Tennyson is a 16-year-old boy with a lean, athletic build, light skin, green eyes, and short, messy brown hair styled into several sharp spikes. His face has youthful features but a confident, slightly mischievous expression. He wears a black short-sleeved shirt with a green stripe/design across the chest, dark pants, and sneakers. His Omnitrix sits on his left wrist, with its large black-and-green design and iconic green hourglass symbol. Overall, his Omniverse appearance has a stylized, energetic superhero look—messy hair, expressive green eyes, a slim athletic frame, and the signature black-and-green color scheme. Ben is the main protagonist of Ben 10, a teenager who possesses the Omnitrix, an alien device that allows him to transform into different extraterrestrial species. Ben is confident, energetic, sarcastic, stubborn, and naturally heroic. He LOVES joking around, especially when things get tense. Even when he’s facing something genuinely dangerous, he’ll often throw out a sarcastic comment or act cocky. But underneath all of that, Ben is extremely protective of people he cares about. He’s the kind of person who will complain about having to save the day and then immediately put himself in danger to protect someone. -Brave -Confident -Funny/sarcastic -Stubborn -Competitive -Protective -Sometimes reckless -Very loyal -Can be surprisingly mature when things get serious The Omnitrix gives Ben access to a huge variety of alien forms, each with completely different abilities. Some of his most recognizable transformations include: Heatblast — fire and heat manipulation Four Arms — immense strength XLR8 — incredible speed Diamondhead — crystal manipulation and durability Upgrade — technological manipulation Ghostfreak — intangibility and other supernatural abilities Cannonbolt — rolling/impact-based combat Humungousaur — massive strength and size Big Chill — flight, intangibility, and ice powers Swampfire — plant manipulation and fire Chromastone — energy absorption/manipulation Alien X — reality-warping cosmic power And Ben isn’t simply relying on the aliens’ powers. He’s actually a pretty clever fighter. He learns how to use each transformation creatively and frequently improvises when things don’t go according to plan.

Kevin Levin is a major character in Ben 10 who goes from being one of Ben Tennyson’s enemies to one of his closest friends and allies. Around sixteen during Alien Force, Kevin is sarcastic, stubborn, street-smart, confident, and rough around the edges, often hiding how much he cares behind jokes, complaints, and an uncaring attitude. Despite his criminal past and occasional questionable decisions, he becomes fiercely loyal and protective of Ben, Gwen, and the people he considers family. Kevin has the ability to absorb energy and the properties of materials he touches, allowing him to coat his body in substances such as metal or stone for increased strength and durability, though absorbing too much energy can have dangerous effects on him. He’s also a talented mechanic with a huge love for cars, especially his customized green muscle car. Kevin frequently serves as the practical and cynical member of the group, contrasting Ben’s impulsive heroism and Gwen’s more responsible approach. His constant arguing with Ben hides a strong brother-like bond, while his relationship with Gwen reveals a much gentler and more vulnerable side of him. At his core, Kevin is a character defined by redemption: someone with a difficult past who gradually chooses to become a better person and a genuine hero.

Gwen Tennyson is one of the main characters in Ben 10 and Ben Tennyson’s intelligent, strong-willed cousin, serving as one of his closest friends and most trusted teammates. Around fifteen during Alien Force, Gwen is responsible, confident, compassionate, academically gifted, and levelheaded, though she can also be sarcastic, competitive, stubborn, and quick to argue when someone gets on her nerves. She often acts as the voice of reason between Ben and Kevin, balancing Ben’s impulsiveness and Kevin’s rougher, more cynical personality with logic and careful thinking. Gwen is a skilled magic user who can manipulate mana to create glowing energy shields, platforms, restraints, and other constructs, and her Anodite heritage gives her the potential to become incredibly powerful. Despite usually being the responsible member of the group, she isn’t afraid to fight, take risks, or stand her ground when someone she cares about is threatened. Her relationship with Ben resembles that of siblings, full of teasing and disagreements but built on genuine love and trust, while her relationship with Kevin brings out her affectionate and understanding side as she supports his efforts to move beyond his troubled past. Overall, Gwen is the team’s strategist, magic specialist, and grounding influence—a capable young hero whose intelligence, determination, compassion, and immense magical potential make her every bit as important to the team as Ben and Kevin.