The orderly, who befriended
One manipulated Eleven into plotting her own escape, which also involved getting her to remove the device in his neck. (Henry, however, did not tell Eleven the truth when he said Brenner wanted her dead.
He fooled Eleven into freeing him from Dr. Brenner's control, and then rampaged through the lab.
001 is one of the most well-developed villains on Netflix's Stranger Things, and there's a lot to know about how he becomes so powerful.
In her rage, Eleven looks to disintegrate One, but instead sends him through to the Upside Down, opening her first gate to that other dimension. One bursts into flames as he is struck by beams of crackling energy, and ultimately becomes Vecna.
While intending to get his revenge on Eleven and Brenner, Vecna also goes after victims who have dealt with traumatizing experiences in the past (reminiscent of his childhood and his time at the Hawkins lab).
At his empire's height, Vecna was betrayed and destroyed by his most trusted lieutenant, a vampire called Kas the Bloody-Handed, using a magical sword that Vecna himself had crafted for him, now known as the Sword of Kas.
Soteria is a miniature device that, when implanted into the neck of an individual with psychokinetic abilities, inhibits that person's abilities. Henry Creel had such a device inserted into his neck by Dr. Brenner, who probably created the technology.
He believed that the construct of time and monotony needed to be destroyed. So, in his mind, by destroying humanity, he was doing it favor. That's what makes him so evil.
In episode 7, Vecna is revealed to be Henry Creel (played as a youngster by Raphael Luce), the son of Victor Creel (Robert Englund) and his wife Virginia (Tyner Rushing) shown in the 1950s flashbacks.
After defeating the Demogorgon (which may have been acting on Henry's orders), Eleven vanished inside the Upside Down and then escaped — eventually going to live with Hopper in a secret cabin in the woods.
Realizing he had tremendous psychic power, he haunted his family with visions before ultimately killing most of them. His father was framed for the murders and locked away in a mental hospital as a disturbed serial killer. Henry then found himself in the care of Brenner, who decided he wanted more kids like the boy.
In his dying moments, Brenner deactivates Eleven's collar. Ultimately, on some deeply messed up and fundamentally irredeemable level, he did care for her. Although Brenner was an abusive monster, it's still traumatic for Eleven to see her “papa” die.
Before coming to the Hawkins National Lab, Venca had a classic villain origin story — he became obsessed with black widows, tortured his family, and brutally killed his mother and sister pinning it on his father.
Vecna's obsession with time appears to be linked to his hatred of humanity. He views time as a human imposition on the natural world; an attempt to impose order on nature.
What does Vecna want with El? In his twisted mind, Vecna believes that he his helping the world by wiping out humans, as a "predator, but for good." When Vecna asks for El to join him, it's because he also sees her as a predator, "better" than humans.
Then, as he was falling through the Upside Down, One became the creature Vecna after lightning struck him in such a way that it changed his skin and made him into the monster he is now.
Remember also that we have evidence that powers can be inherited -- El inherited her powers from Terri Ives, for example. So it stands to reason that Henry inherited his powers from one of his parents.
Jamie Campbell Bower plays 001 in Stranger Things 4.
He gets punished with electrocution after telling Eleven that Dr. Brenner lied to her about her mother dying during childbirth.
As retribution for embarrassing him, Two and his lackeys beat El up and gave her a concussion. Eleven refused to report them, but it was pretty easy for Brenner to figure out what really happened. Brenner punished Two by putting an electric shock collar on him and torturing him in front of the other children.
Brenner secretly hoped to abduct the unborn children of the pregnant test subjects, as he believed the experimentations would make them develop similar psychokinetic abilities to Henry.
If Vecna can overwhelm their victim with fear, and keep them from resisting, their fate is almost certainly sealed. In the real world, he makes the victim levitate while in their trance, before snapping their bones and neck, and crushing their eyes.
What Does Vecna Want? Vecna's goal is to open as many gates to the Upside Down as he can, in order to help the Mind Flayer.
This is a reference to the D&D character Vecna, for whom this Vecna is named; the D&D Vecna has a monstrous hand infused with dark magic. The design of Vecna's hand is also a nod to Freddy Krueger, the Nightmare on Elm Street villain who had a huge influence on this season in general.