Caiera is a fictional character in the , introduced during the "Planet Hulk" storyline. She first appeared in Incredible Hulk v3 #92 (April 2006), and was created by Greg Pak and Carlo Pagulayan.
Caiera is a member of planet Sakaar's native race. When she was thirteen years old, she was kidnapped by the Red King. At the time she was still in training and hadn't earned her marks (rites of passage resembling tattoos which are given by her people to those who show great strength in battle). But the elders of her people knew that she had the old "Shadow Strength", which seemingly is some sort of legendary physical ability. The Spikes were sent to attack her people, infecting everyone in her village. Caiera was forced to slay her own father after he was no longer in control of himself. The elders told her to run, but Caiera refused, choosing instead to remain and fight, as she had surmised it was a good day to die. The Red King, still a boy at the time, ordered his guards to kill the Spikes and convinced Caiera to join his side. He had his guards throw a dart into Caiera's body, marking her as his slave but still granted Caiera the rank of Lieutenant of his army.
Years went by, and Caiera remained the Red King's slave. The Hulk's arrival on Sakaar was the first of many events that would bring about her freedom, however. After a brief time as one of the Red King's gladiators, the Hulk rebelled against the Red King's power and armies. Though Caiera and the Hulk at first fought on several occasions, Caiera sought her chance to redeem and escape. Caiera fought alongside the Hulk against her former master, and she and the Hulk became lovers. After the Hulk killed the Red King in battle, he took over the alien planet and became its new ruler. Not long afterward, he asked Caiera to become his queen rather than his bodyguard. She accepted and, after a short ceremony (where she was introduced to Bruce Banner for the first time, asking the Hulk to bare his soul to her as she bared hers to him) they were wed.
She revealed that she was carrying the Hulk's child , but she and (seemingly) her unborn child were killed as a result of the devastating explosion of the warp core of the shuttle that brought Hulk to Saakar. Caiera's death, the deaths of millions of innocent people, and the resulting chaos that ravaged most of Saakar's surface with violent volcanic eruptions galvanizes Hulk to return to Earth to exact vengeance on the Illuminati.
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