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Mitch & Tiff are the secondary antagonists of Jurassic World: Camp Cretaceous, serving as the main antagonists of Season 2 and posthumous antagonists in Season 3.
At first, they pretend to be lost tourists who are willing to help the kids escape from Isla Nublar and return back home to their families, but in truth, they are big-game hunters who enjoy killing dinosaurs and other animals and using them as trophies in order to sell them to the black market.
Mitch and Tiff first present themselves as tourists who will help the kids escape Isla Nublar and return back home, but they are, in truth, sadistic poachers who just want to murder dinosaurs on Isla Nublar. Mitch himself says that he wants to hunt for dinosaurs to preserve their legacy due to Isla Nublar being sealed off soon.
Individually, Mitch does genuinely admire dinosaurs and like Darius, still being polite after revealing his true colors, is a bit reluctant to hurt the kids and does offer taking them back to their homes. In comparison, Tiff is utterly sadistic, saying that killing Grim did help her calm down, and is perfectly willing to kill the kids, smiling while doing so, and hating children in general. Tiff has no qualms about betraying anyone, including Mitch himself, to save her own skin.
At some point in their lives, they became a married couple due to their love of poaching and collecting trophies to sell them in the black market. Afterwards, the two began hunting endangered species around the world, just for the sake of it. Eventually, they came to the island of Isla Nublar and started hunting dinosaurs, even hiring a strong man named Hap to be their bodyguard.
Jurassic World: Camp Cretaceous
When the two meet the Camp Cretaceous campers, they pretend to be lost ecotourists who are currently stuck on Isla Nublar, but Darius sneaks into their tent and discovers the bust of a Cerotopsian head, after which Mitch threatens him that if he doesn't help him and Tiff find the watering hole, then they'll kill his friends. However, Darius instead takes them to Jurassic World's Main Street after the park's systems are shut down, though they are recovered by the campers under Brooklynn's guidance.
Because of the park systems' recovery, Mitch and Tiff figure that they don't need to use Darius to find the watering hole anymore because their tablet has now received power again, but along the way, they accidentally get themselves stuck inside Toro's old paddock and Tiff gets shocked by the paddock's electric fence. Nevertheless, she shoots Grim to her death as the Baryonyx was about to attack her, which causes Chaos and Limbo to desire revenge on her for killing Grim.
When Mitch and Tiff discover the watering hole, the latter attempts to shoot Blue, but she is stopped by the campers, who cause a stampede in the watering hole to save any remaining dinosaurs there from being shot by the two poachers. As Mitch and Tiff escape, they are chased down by Rexy, but the former is ensnared by one of their own traps. To ensure her own survival, Tiff leaves Mitch behind to die, who is devoured by Rexy in revenge for stickling his cattle prod up her nose, and attempts to escape on their ferry, but she is killed by Chaos and Limbo, thus avenging their fallen companion.
Although already dead, their ferry is used by the campers as their newest way to escape Isla Nublar, even succeeding at the end of the season. However, it's implied a dinosaur managed to hop onto the ferry, therefore setting up Season 4. Meanwhile, it's also shown that Chaos and Limbo have escaped the ferry soon after killing Tiff, with implications that they've taken her off the ferry and eaten her in the wild, given that her body is nowhere to be found, and that the duo is seen wandering around the island. They are also seen through a flashback during the sixth episode, where Yaz is chased by a Scorpios rex and has a memory of Sammy pushing Tiff away from her.