With the appearance of another Klyntar-wearing hero, the Earthling named Flash Thompson, aka Venom, Myntril and Tarna followed him for some time to see if he was worthy of being an Agent of the Cosmos. After one of Venom's missions, Venom's ship was abducted by Tarna's and Myntril's. In the landing bay, Tarna attacked Venom, initially refusing to believe he was one of them. Even after Myntril cleared everything up, Tarna treated Venom with hostility. Tarna was then put in charge of Venom's training, though Myntril noted she was unlikely to fulfil her duty.
When the Agents of the Cosmos detected that the Venom symbiote was displaying an increasing amount of rage, Tarna tracked down its wearer to have the symbiote returned to the Cosmos and replaced. Tarna's hostile attitude created a misunderstanding and Flash refused, prompting a fight. The Venom symbiote then confronted Tarna personally and seemingly killed her symbiote with the afterburners of her ship before escaping.
Flash's dedication to the Venom symbiote even after its relapse into corruption both confused and impressed Tarna, as it went against everything the Agents of the Cosmos had taught her. She assisted Flash in his search for it, but cautioned him that he should let the other members of his team handle Venom, as it likely intended on rebonding to and corrupting him. When the symbiote ambushed them attempting to lure Flash away from the group, Tarna was incapacitated and left behind. However, she and the others managed to track Flash and the symbiote down and stop it from corrupting him.
Having been impressed by Flash's loyalty to his symbiote and beginning to question her own to the Agents of the Cosmos, Tarna protested the symbiote's trial by combat but was warned that if she continued to do so she would be put on trial herself. She impersonated Myntril to allow Flash into the gladiatorial arena to assist the Venom symbiote, and engaged her mentor and the other Agents of the Cosmos in combat to buy them time. Myntril commended her loyalty to her new friends but chastised her disobeying orders, permitted her to accompany Flash on his mission to fully cleanse his symbiote but telling her when she returned she would be put on trial herself.
While Flash and the Venom symbiote went to Earth to find Mania, Flash's protege who was bonded to a demonically-augmented clone of the Venom symbiote; Tarna led the others on an expedition to Wenb to retrieve an elixir that could temporarily cleanse Mania's symbiote of its corruption. While there they encountered the Space Knights, but were forced to work together to fight off a horde of trolls that attacked them. Tarna's team and the space knights arrived on Earth in time to stop Mania from killing Venom and inject her with the cleansing serum, which restored her sanity. After this, Tarna defected from the Agents of the Cosmos, having been inspired to follow her own path, and joined the Space Knights.
Tarna later resurfaced as a member of the Kree/Skrull alliance under the leadership of Emperor Hulkling. She was part of a crew led by Talos that was investigating the cease in communications from a number worlds which had fallen to the path of destruction of Knull, the god of the symbiotes. When Talos' crew approached one of these worlds, Gnarrat, their ship was boarded and taken over by symbiotes. Talos and Tarna were the only crewmates who managed to flee on the ship's escape pods, but she was ultimately intercepted and taken over by a symbiote.
The infected crewmates were later ordered by Knull to kill Emperor Hulkling on his behalf, and they tracked him down to the resort planet of Little Chandilar during his honeymoon with Wiccan. When they attacked him, Hulkling recognized them as Talos' crewmates. After Wiccan used his powers to empower himself and Hulkling with something capable of repelling the darkness, Hulkling used his sword Excelsior to channel Wiccan's light and strip the symbiotes off Tarna and the crew. Afterward, the unconscious crewmates were boarded to Hulkling's ship to return with him to the Alliance for treatment.
Tarna is brusque and aggressive, deeming Flash Thompson and the Venom symbiote unworthy of being Agents of the Cosmos and trying to kill them. Myntril mentions that Tarna is feared by all who have met her, and that while she was placed in charge of training Flash, she was unlikely to do so.
Flash's loyalty to the Venom symbiote despite its corruption inspired Tarna to defy Myntril's orders and help him put a stop to the symbiote's trial-turned-execution, an act for which she was told she would be placed on trial to determine if she was worthy of being a member of the Agents of the Cosmos. Deciding that she wanted to follow her own path, Tarna subsequently defected from the Agents of the Cosmos to join the Space Knights.
Powers and Abilities
- Skrull Physiology:
- Shapeshifting: As a Skrull, Tarna is capable of changing her appearance at will, enabling her to impersonate others or augment her offensive capabilities.
- Tarna and M'lanz are the only known Skrulls to have bonded to symbiotes.