Gwen Tennyson (Classic)/Omniverse

After the events of Ultimate Alien, a 16-year-old Gwen was seen with Ben and Kevin chasing Zombozo through Bellwood. Shortly after fighting and capturing Zombozo, Gwen said her goodbyes to Ben because she was heading to college. She then told Ben to stay out of trouble and got into the car with Kevin (who also revealed that he was going to stay near campus), then the two drove off, leaving Ben to deal with Zombozo.
Sometime later, she made the decision to take up the mantle of Lucky Girl again.
In Many Happy Returns, Gwen returned with Kevin to visit Bellwood for the week. She returned with an all-new look. They marked their return by saving Ben as Rath from a burning building when he was trying to save a toy. The next day, they go for smoothies, only to be attacked by Princess Looma Red Wind and Kevin revealing that he was forced to marry her in order to get the engine block he needed for his ship, and later his car. After battling Looma again, Gwen showed her new Anodite form/Lucky Girl to try to finish it, but Looma's father intruded by forcing Kevin to marry her. Ben defeated Looma, but he later found out it just made him Looma's fiancée. Kevin awkwardly left, not telling Ben he just came to Bellwood to "pawn" Looma on him. Gwen assured Ben that she would make frowning faces on the ride back and the two rode off.
Gwen returned in Showdown: Part 2 where it was revealed that Max used her to track Ben's location through his mana. She also went along with Azmuth and Rook to the remains of Galvan B to find clues to solve the problem involving reviving the Galvanic Mechamorphs and defeating Malware. Gwen was seen again after Malware is defeated and was surprised that Kevin knew that Khyber's former dog is a girl. Gwen then flew back home along with Ben, Rook, Kevin, and Max.
Gwen was seen again in The Frogs of War: Part 2 where she, along with Rook, Kevin, and Argit gathered supplies and weapons to fight against the invading Incurseans. However, they nearly got blasted by some Incurseans and escaped outside, avoiding the Way Bads. They eventually reached Ignacius Baumann's shop and Gwen and the others entered the back. Gwen broke up an argument between Rook and Kevin and suggested breaking Max out of Plumber Headquarters. As she and the other prepared to do so, they were stopped by Attea and a bunch of Incurseans. However, an alien by the name of Bullfrag fought the Incurseans and led them to a ship. Bullfrag got knocked out and tied up by Kevin, who demanded an answer. Gwen then looked into Bullfrag's eyes and told Blukic to let him go. The group eventually reached Plumber Headquarters and they freed Driba and Max. Bullfrag went up to him saying "Grandpa", revealing to be actually Ben but Attea soon appeared behind them. Kevin was surprised and Gwen told him that no one else would come up with a name like "Bullfrag". Gwen then blasted Attea, becoming annoyed with the flirting. Gwen then heard the story on how Ben survived in space and unlocked Bullfrag. Gwen was seen again after the capture of Milleous but soon knew that Attea was playing them the entire time. Gwen and the others were forced to watch Attea leave with the entire Incursean army as if anything hadn't happened. As Ben said that he wanted a smoothy if a Way Bad hadn't destroyed all of them, Gwen remarked "Ben Tennyson is back."
Gwen returned from college in Mud is Thicker Than Water. She visited Ben at the Plumber Headquarters while Rook and Kevin headed off to an auto-show, only to find out that her cousin, Lucy Mann, had become a Plumber. They realized that their Plumber technology was stolen by a spy. She and Ben then saved the power core from exploding, which was used as a distraction so that the spy could steal their Plumber tanks. She suspected that Lucy was the spy as she arrived since the threat started. The Plumbers decided to move all the tech off the planet, starting with the Annihilarrgh, which Blukic and Driba had fixed. Psyphon's Gang then attacked the Plumber ship and took the Annihilarrgh. Gorvan was then revealed to be the spy among the Plumbers. Suddenly, the Plumbers arrived to take on Psyphon and his gang. Psyphon was shocked and he blamed Gorvan for telling the Plumbers their location, but Lucy, disguised as Liam, revealed herself as the one who told them their location, making Psyphon even angrier. Gorvan tried to escape with the Annihilarrgh, only to be stopped by Gwen using the judo techniques she learned for nine years. Psyphon and his gang were stopped by Ben as Crashhopper. Suddenly, Vilgax arrived, scaring Psyphon, only for Vilgax to be revealed as Lucy in disguise. Psyphon was then defeated by Lucy in her Lenopan form and Crashhopper. Gwen threw the Annihilarrgh at Ben. It was revealed that it was a fake one to use as bait to stop the threat. Back at Plumber Headquarters, Gwen apologized to Lucy for suspecting her but Lucy did not mind at all, and the two of them started talking in the end.
Gwen, Kevin and Zed were seen in the Rustbucket 3 in For a Few Brains More. They helped Ben, Rook and Max, but Gwen failed to save the Proto-TRUK, which ended up being damaged with Max and Rook passing out. Khyber and his Panuncian attacked Kevin and Zed. Gwen helped Rook and Max up, with Azmuth removing her spectacles. Albedo as Ultimate Gravattack took Azmuth's brain from Ben as Gwen trapped Khyber using a few planks. Ben transformed into Pesky Dust to get information from Khyber about Albedo's location in his dream. Gwen's shield broke from Khyber's Panuncian and Rook shot at it. Gwen trapped it as Kevin removed the Nemetrix with the help of Ben as Water Hazard. The team headed off to Billions Tower to confront Albedo. Gwen shot mana at Albedo but her attacks got reflected and she was knocked out. The team was then trapped by Albedo's power. Azmuth transformed Ben into Bloxx and freed the team. Albedo transformed into Ultimate Humungousaur and hit Ben. Azmuth transformed Ben into a new alien, Atomix, who easily took out Ultimate Humungousaur. He hit Gwen and the rest of the team up to high altitudes as he finished Albedo, who transformed into Ultimate Spidermonkey, with a blast. Azmuth received his brain back as Albedo turned into a copy of 11-year old Ben, altered by Azmuth.
thumb|Gwen as Lucky Girl
Gwen made an appearance in Mystery, Incorporeal, in which Ben and Rook visited Friedkin University. She, Kevin and Zed eventually helped Ben to fight a Rock Monster, and to investigate who was behind the attacks of the monsters. Once the team found out that it was Darkstar's doing, Ben, Rook, Kevin, and Zed fought many obstacles, including a fully-powered Morningstar who had absorbed Gwen's powers. The team eventually stopped him and saved Gwen with the help of Ben as Ghostfreak. Soon, Ben saved the day and Gwen obtained her first mystical Charm of Bezel, also providing the ability to telekinetically fly at high speeds. For saving the day, Ben was given an honorary degree and he and Rook left for Bellwood.
In Charmed, I'm Sure, although Gwen did not make an on-screen appearance, Rook texted her throughout the episode. Rook mentioned that they talk a lot, and she told him all about Charmcaster. She helped Rook on Ben's poor skin condition, as well as to carry magical supplies such as her spellbook to try and cure Ben's skin and defeat Charmcaster. Ben thought that Gwen was trying to do something bad, but Rook disagreed. However, most of the spells Gwen asked Rook to try did not work as Rook was not in close proximity to the Alpha Rune until the end where Charmcaster held possession of it. In the end, Gwen told him that it was due to Swampfire's growth into its new form that caused Ben's poor skin condition.
Gwen made an appearance in the two-part episode Weapon XI: Part 1 and Weapon XI: Part 2 where she received a coded message from Kevin. She, along with Rook and Ben then set off to find the Amalgam Kids. Then, together with Argit and Zed, the team set off to find Kevin and take on the Rooters in the Null Void. Servantis then turned the Amalgam kids and Kevin against Ben, forcing Gwen, Rook, Ben and Zed to take them on. Gwen and Rook took on Swift and Leander who defended the Null Void Projector after escaping from the Way Bads while Ben went into Rooter Headquarters to take on Kevin, who absorbed his Omnitrix and mutated for the fifth time. Gwen was knocked out by Swift. Fortunately, Rook immediately saved her from the exploding generator of the Null Void Projector which Swift and Leander attacked. Gwen then wondered how they would get out while Ben, as Swampfire still struggled with Kevin's attacks, eventually passing out. Kevin then surprised Servantis and shocked the Amalgam kids by knocking out his Loyalty Neuro-Matrix and was locked out of their heads for good. Gwen, Rook and Zed arrived and were glad Kevin did not turn insane, thanks to the first brain spark from Servantis. The Plumbers then arrived with the Magistrata, having the Rooters' Plumber status revoked and their Plumber tech confiscated, leaving them stranded in the Null Void with the Way Bads. Gwen was then seen talking to Kevin about the letter containing his coded message as Ben was eager to eat, wishing the Rooters luck when facing the Way Bads.
Gwen appeared in Charm School, where she was attending class conducted by her favorite teacher Hex. They got over their conflicts as Hex had put his past behind him and was a professor in her school. She was surprised to notice Charmcaster in her school, so she decided to talk to her. Later, she called Ben and Rook over to her school on the case. Ben attacked Hex, but Gwen explained to him that Hex is a good guy now, proven by using her magic spell that confirmed that all the students were not influenced or brainwashed by Hex, that he was completely normal. She then faced Charmcaster, who has turned Hex into a Stone totem and obtained his staff. As Lucky Girl, Gwen gave everything she got in the face off with Charmcaster, but none of her spells and attacks worked on her. She then casted a spell to clone herself as a distraction so that she could grab Hex's stone totem. Together with Ben as Ghostfreak, Kevin, Rook and Zed, they led Charmcaster into Hex's library in the school as Gwen had a plan in mind. When Charmcaster reached the library, Gwen blasted her and Charmcaster assumed she was about to give up, but because Gwen was holding onto Hex's stone totem, it gave her access to his library and all the magical powers, making her even more powerful. This time, Charmcaster's attacks did not work on her as Gwen grabbed Hex's staff. As Charmcaster was about to make another attack, she quickly opened a portal to Legerdomain and sent both Charmcaster and Hex into that dimension. Gwen now held possession of her favorite teacher's library of magical artifacts and his staff, leaving her with a huge responsibility to take care off, as well as having a lair for her Lucky Girl in campus. The episode ended with Kevin and Rook going off to the auto-show with an excuse, and Ben was left in school, trying to figure out on how to get back to Bellwood.
In Third Time's a Charm, Gwen was lured to Legerdomain when trying to get Kevin's car back. Charmcaster appeared and transformed Gwen into a stone totem, which she put into her bag. There, Gwen encountered Hex, Darkstar and Addwaitya, who were too busy bickering with one another to help her escape. Gwen came up with her own plan, drawing a magic circle on the inner bottom of the bag and tricking Charmcaster into reaching in and touching it. When she did, Charmcaster was transformed into a totem and all her victims were restored to normal. The episode ended with Gwen keeping Charmcaster, who was sealed in her own bag, in her headquarters, remarking that she believed she and Charmcaster could become friends now that Charmcaster was rendered harmless.
Gwen briefly appeared in The Most Dangerous Game Show where she was among the contestants to compete for Ben's hand in marriage. However, she was quickly eliminated before the competition started after Ben told Zenith that they were cousins, along with other family members who are already related to him.
At the end of A New Dawn, Ben called Gwen to get Kevin as he proposed that Ben, Gwen, Rook and Kevin go on a road trip together to explore the universe.