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The Indominus Rex was one of the most influential antagonists of the Jurassic Cinematic Saga.
She was the central main antagonist of Jurassic World and the main antgonist of the first half of Jurassic World: Camp Cretaceous season 1. She then served as the posthumous overarching antagonist of Jurassic World: New Era, Jurassic World: Dino Crisis, the rest of Jurassic World: Camp Cretaceous and the final film, Jurassic World: Dominion.
She was a man-made superhybrid dinosaur who in public was meant to serve as the upcoming main attraction for Jurassic World, while in reality she was just a bio-weapon created by Henry Wu and Lewis Dodgson, to be unleashed upon visitors and eventually cause the destruction of the theme park and Masrani Global Corporation.
Behaivoral characteristics[]
During her infancy, the Indominus Rex was an incredibly curious and intelligent creature, not showing any signs of psychotic personality traits which she demonstrated during her teenage years (she was only 7 years old by the events of Jurassic World, not fully an adult). Growing up in isolation caused her mental state to slowly detoriate and develop a grudge against humans for keeping her inside a cage for the entirity of her life.
After her breakout, the I.rex possessed a genuine interest in trying to befriend the other carnivorous dinosaurs on Isla Nublar, wishing to bond with them and form a connection with them. However, she didn't understand that the other dinosaurs reject her due to her menacing appearance and size, and because of this, she quickly began to slaughter not just humans, but also dinosaurs due to her hatred torwards them.
After this breaking point, this version of the dinosaur began to act very much like her official canonical version: a lethal fusion of agility, brawn, and an eerily high degree of intelligence, capable of formulating elaborate plans. Though she was initially believed to be only driven by instinct, the Indominus rex's actions proved that, unlike regular carnivorous dinosaurs, she was driven by sheer hatred and pure sadistic pleasure, given the fact that she went too far by laying waste to the cage that confined the pterosaurs simply to kill Masrani who piloted a helicopter that was armed with a minigun, killing or severely maiming several Apatosauruses and a Brachiosaurus, using the Ankylosauruses to damage the gyrosphere to make it easy for her to destroy it, and relentlessly pursuing the two kids in it: Zach and Gray Mitchell. It's also worth noting that instead of eating the Ankylosaurus she killed, she tried to kill the boys, and after they jumped in the water before waiting to see if they would swim to the surface so that she could kill them once again, highlighting her sadistic personality. She also relentlessly pursued the children staying at Camp Cretaceous on the other side of Isla Nublar during her journey towards the Pteranodon aviary.
Her sinister and diabolical nature was the result of both her unstable genetic makeup (which affected her mental state that led her to have cannibalistic traits) and the negative treatments that she had. She was isolated within her paddock from the rest of the dinosaurs instead of being given an actual life companion, and her sole positive interaction was with the crane that brought her food to her paddock. In turn, this left her into a complete sociopathic killer. Even compared with other carnivores like the Big One, who was merely attacking the protagonists due to seeing them as threats to her kind, the I. rex was primarily motivated by a taste for revenge and an intense but somewhat justified sense of misanthropy, as indeed, she attacked other dinosaurs for fun.
She also appeared to hold a higher degree of hatred towards the human race and would pick killing and eating humans over hurting dinosaurs whenever she could. Despite this, she was still intelligent and manipulative enough to convince Owen's raptors to turn against him (which was temporary, as she did so by blackmailing them due to the fact that the raptors followed her out of fear), which is the only instance where she "stayed her hand". However, when Blue confronted her and asserted that they would not kill Grady, she showed no compunction in injuring and killing her new pack.
While inheriting the worst traits of some of the most dangerous dinosaurs was bad, the negative treatments that she had later on eventually led to her becoming the monstrous, aggressive, and sociopathic killer that she, unfortunately, became. Had she been treated in a more positive and better way, there is no way that she would have caused so much destruction and deaths in Jurassic World.