Gwendolyn "Gwen" Tennyson is a Human/Anodite hybrid Plumber, the paternal first-cousin of Ben Tennyson, and (along with Kevin Levin) a frontline member of his team. Gwen was first introduced when her parents send her on a summer-long road trip with her Grandpa Max and her cousin Ben. She has, as Verdona refers to it, "The Spark" similar to Anakin Skywalker in the Star Wars series, as they call him "The Chosen One".
In the original series, Gwen had short red hair and green eyes. As she has grown older, her red hair is now long and her green eyes seem to have darkened.
In the series Ben 10, Gwen wore a blue shirt with a cat logo on her chest (However in Ben 10,000 Returns the cat was gone for some reason). Her lucky girl outfit is worn in Tough Luck & Lucky Girl. Gwen has been seen with two swimsuits. She also wears stud earrings on both ears, but they were removed by Alien Force..
In the first and second seasons of Alien Force she wears a white shirt under a dark blue sweater, black stockings under a black mini skirt, and black high heels. In the third season, she wears a dark red shirt paired with a black vest, gray skinny jeans, and black flats. Her hair is worn in a high ponytail. She also appears with three swimsuits, a karate gear and a white prom dress. Her Lucky Girl outfit is also seen in Ben 10: Alien Force.
In the Ultimate Alien series, her outfit is similar to her outfit from the first two seasons of Alien Force, but with a red sweater while her hair still is now slicked back in a ponytail. Her outfit has been scratched 4 times during Reflected Glory, Absolute Power: Part 2, The Transmogrification of Eunice, and It's Not Easy Being Gwen. She wears a snow jacket in Escape From Aggregor, and a training suit in Basic Training.
In Season 2 of Ben 10: Ultimate Alien she briefly wore her outfit from Season 3 of Ben 10: Alien Force.
In the original series, Gwen uses her laptop to research any strange people and creatures they might come across. She is a capable gymnast and has had some training in martial arts.
In Ben 10,000 her alternate future self says she got her black belt years ago (probably referring to Alien Force) and it's come in handy many times. She has also shown an almost innate skill in using various complicated devices or objects, such as in the "What If?" episode Gwen 10, when Gwen gained the Omnitrix instead of Ben and proved to be far more adept in its use than he initially was, even being able to write her name with fire while Ben took a month to be able to do it (although she may be able to use it better because of her magical and Anodite powers because manipulating energy is natural for her).
She is depicted as snobbish due to her young girl attitude. Overall, her most notable skill is her innate, if latent, ability at magic. Having within her what Charmcaster calls a "magical aura", Gwen is capable of using various magical artifacts, charms, talismans and spells. When using the magical, luck-giving Charm of Bezel, she was able to activate it instinctively, whereas Hex did or could not. Later on, when she takes and uses his staff, she was able to make it fire a yellow-colored energy blast (according to Charmcaster), only someone of Hex's skill should have that ability.
Gwen starts tapping into her magical powers when she procures a small book of spells from Charmcaster in the episode A Change of Face. On two occasions, Gwen uses the Charms of Bezel's incredible and unique powers and abilities to become a superhero by the name of "Lucky Girl". At first, her ability drew from the luck-granting, Charms of Bezel, which innately gave her perfect luck and the abilities and powers of probability manipulation. While wearing the charm, any action she took would result in a Rube Goldberg-style chain reaction benefiting her original intent, but usually injuring Ben in the process. She later brought back her superhero identity after obtaining the legendary Keystone of Bezel, which greatly strengthened and increased her natural abilities to super human levels rather than just affecting her luck. Both times, Gwen was forced to retire when the Charms of Bezel were destroyed.
Ben 10: Alien ForceEdit
Gwen is now a black belt (taking classes in Karate), but tends to favor using her powers. She is capable of creating energy constructs for nearly any purpose, usually creating platforms to levitate herself (and others), beams to grab enemies, circular blasts to knock enemies back, projecting beams from her eyes that seem to simulate heat vision, and opening up interdimensional portals.
In Ben 10,000, her future self is able to create time portals. She also has a wide range of other loosely defined supernatural abilities, such as dowsing, limited telepathy, and clairvoyance. In the episode Everybody Talks About the Weather, Kevin said she gets her powers and abilities from her alien bloodline, but she refused to believe him. Little did she know that she would realize he was right in, What Are Little Girls Made Of?.
Her powers and abilities are revealed to be of alien descent; her paternal grandmother, Verdona, is an energy being known as an Anodite; from the distant planet Anodyne, and surprisingly she seems to be the only human descendant who inherited Verdona's powers. Verdona tells Gwen that what she and others originally thought of as "magic" was actually the control of mana, a substance of magic-making Anodites; a magic-wielding race. Verdona offers to take Gwen to her home planet and train her in the immense mystical and magical ways of the Anodites, but Gwen prefers to remain on Earth with Ben and Kevin. She dislikes being called an "energy being", referring to her Anodite heritage as revealed in the episode Paradox. In the episode In Charm's Way, it's implied that highly gifted humans like Charmcaster can also be trained to utilize mana. In Unearthed, an alien creature was able to see her as an Anodite, in which she looked exactly like her paternal grandmother's true form, but slightly shorter. In the two-part second season finale War of the Worlds when Kevin was threatened by a Highbreed Commander, she released her dormant innermost Anodite self for the first time, and easily defeated the commander with an exceedingly strong powerful burst of pure magenta-pink glowing energy. She was almost overwhelmed by her own power and wanted to defeat the highbreed all on her own before Kevin snapped her out of it by saying " I can't lose you"
During the course of the series she has developed a romantic relationship with Kevin. They have also been shown to have arguments, usually starting with Gwen always trying to force Kevin to "ask her out" and him always answering "Don't push me" (which she once did). In the episode Save the Last Dance, Gwen has a dance in her prep school and expects Kevin to ask her out. The episode ended with Gwen and Kevin dancing together in the moonlight.In the same episode, it was revealed that she liked yellow roses.
Hanging Ten: It Came From Room 1313Edit
Ben 10, 000Edit
In the third season premiere, Ben 10,000, thirty-year-old alternate future Gwen (who has been going by Gwendolyn since college) brought Gwen and Ben twenty years into the future during Grandpa Max's 80th birthday. Her hair is now short.
In the non-canon episode Ken 10, an astral projection of a 42 year old Gwen was seen during Ken's tenth birthday just to say happy birthday to him and gift him a stone monster. She also seems to have the five Charms of Bezel in her possession though for an unknown reason, she does not have the Lost Keystone of Bezel. Her hair is long and worn in a ponytail. In both alternate futures Gwen has a close relationship with Ben and cares very much for him. In Ken 10, she is also seen behind him, saying he should let Ken have a chance.
Powers and AbilitiesEdit
Her naive nature is toned down in Alien Force; she is now even more analytical. It is highly unlikely that she will get stupefied; she is also a quick thinker and an instinctive person. But at times she trusts others too quickly, and that may disadvantage her or even injure her, like in Too Hot To Handle. She can handle things well despite the conditions (such as when her magical powers were drained and Charmcaster hit her with a bolt of magical energy and she immediately reversed the spell though she had no magical, mystic power left yet she could hold herself). Gwen is at times shown to be very concerned with things such as her surroundings, the people around her and the ones who she cares about. She is very strong (physically and mentally) and well mannered, despite her inflating sarcasm and ego at certain times. Gwen is a very caring, compassionate person such as shown from her acceptance of Kevin's past and recent action, also saying she does not care about Kevin's appearance.
In episode It's Not Easy Being Gwen, it shows that Gwen takes her education very seriously. Showing to come home late at all hours of the morning and having to wake up at 5:30am in the morning. When waking up so early she does a number of things before going to school. Such as jogging, practice french, school, and afterschool karate classes. Its also presumed that Gwen goes to private school since it shown that her usual clothing are actually a uniform at her school.