Ben Tennyson I

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Appearance
Ben's physical appearance has changed throughout the series from a ten-year-old to a sixteen-year-old. However, he retains some recurring characteristics. He has shaggy brown hair, green eyes, pale skin, and he's quite skinny for his age, though he shows a lot of muscle definition due to being athletic.
Regular Appearances
In the Omniverse flashbacks in which he was 5 years old, Ben wore green overalls with a white shirt underneath it. White numbers saying "5 1/2" were on a black square in front of his overalls.
In the original series and Omniverse flashbacks, Ben's usual clothes consisted of a black-striped, white shirt with short sleeves, military green cargo pants with side pockets, and black and white sneakers with black stripes. Ben wore the prototype Omnitrix on his left wrist.
In Alien Force and Ultimate Alien, Ben wore a black shirt, blue jeans and a green jacket with white stripes and the number 10 on it, and black and white Converse-style shoes. Ben wore the prototype Omnitrix in Alien Force and the Ultimatrix in Ultimate Alien on his left wrist.
In Ultimate Alien, he wore a standard Plumber suit during a few of his off-world excursions.
In Omniverse, Ben wears a black shirt that has a green stripe in the middle with a white 10 and green stripes on the sides of his shirt. He wears brown cargo pants with pockets at the knees and green and white shoes. He later gains a white hooded jacket with green stripes on both arms and a green number 10 on the right side for some time. He wears the Omnitrix on his left wrist.
In Omniverse, while riding the Tenn-Speed, he wears a white helmet with the number 10 on it, a green visor, a short-sleeved black T-shirt, long white pants and a belt with the number 10 on it.
Occasional Appearances
In The Unnaturals, he wore a blue baseball shirt with the letter "C" at the front and number 23 at the back, white shorts, blue and yellow socks, blue and white shoes, and a blue baseball helmet. Before the baseball game and after he battled the Squires and Coach Finn, he wore a blue and yellow baseball hat with the letter "C" in the middle.
During water-based activities in the original series, he wore a blue swimsuit in The Krakken and A Small Problem and a red and yellow swimsuit in Divided We Stand and Big Fat Alien Wedding.
In Big Fat Alien Wedding, during the wedding ceremony, he wore a purple tuxedo with a red ribbon and white polo shirt.
In Secret of the Omnitrix, he wore a light-blue pajamas. Later in the movie, he wore a spacesuit.
In Ben 10 Returns: Part 1 and War of the Worlds: Part 1, Ben's soccer clothes consisted of the T-shirt he wore as a 10/11 year old but with the number 10 at the back, a long-sleeved green undershirt, green shorts, gray gloves with black stripes, and knee-high socks.
In What Are Little Girls Made Of? and In Charm's Way, he wore green trunks.
In Birds of a Feather, when on the Moon, he wore an orange spacesuit with four arms.
In Video Games, he wore a blue full-body motion capture suit with white balls on it.
In Fused and Revenge of the Swarm, Ben's sleeping clothes consisted of his usual black T-shirt and white shorts.
In Basic Training, while at the barracks in the Plumbers' Academy, he wore an olive tank top and black shorts.
In Inspector 13, he wore a green T-shirt and black shorts.
In Special Delivery, while working for Mr. Baumann, he wore a pink and white cap and a pink apron with a black 'B' on it.
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Personality
Initially cocky, childish, and arrogant, Ben's immaturity and attention-seeking behavior often led him to joke around, regardless of the situation. His allies often criticized his attitude, unaware of the fact that he used humor to mask his fears. Despite some childish attitude, he was heroic, caring and generally good-natured, always willing to save others at any time. As seen in Heroes United, Ben seems to be oblivious to certain things, such as the fact that he was transported to another dimension, yet he thought he was still in his world.
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Over the years, Ben has displayed good leadership skills, as well as the ability to adapt his attitude to a situation, becoming serious when it's called for. He became more mature, responsible and sensible. He's kind-hearted, willing to sacrifice even his own life for others. His idealistic views and unwillingness to compromise his values – aspects condemned by Azmuth, yet commended by others – sometimes drive him to act against reason, such as helping his enemies if they need it (most remarkably Vilgax[1]). Professor Paradox has praised Ben's good nature, going so far as to say he had the gift to make the right choices at the right moments.[2]
However, when Ben fails to save someone, or if someone gets hurt because of his failures, he becomes angry and much more violent. Perhaps the most notable of these instances is when Kevin willingly mutated himself to succeed where Ben had failed and stop Aggregor, Ben was set on killing Kevin, even fighting Gwen when she refused to help him[3]. He also threatened to hunt down and destroy the Forever Knights once making Driscoll promise to cease the hunting of aliens.[4]
Though often stated to be silly or unintelligent because of his immaturity, Ben is cunning and resourceful when needed, quickly adapting when the Omnitrix doesn't provide him with the alien he wanted.
Later on, Ben starts thinking of himself as more of a superhero than a Plumber, often remarking that he's not a cop, but a superhero.[5] Although he once again became cocky, he retained his selfless and heroic nature.
== Friends ==
Kevin Levin (best Friends}
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Catdog
Lizzie McGuire
Otto Rocket
Foxy Love
Kimi Finster {Preteen)
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