"The Gods are pussies."
-Armistice, "The Bicameral Mind"
Armistice is a host in Westworld, and works alongside the character, Hector Escaton. The snake tattoo visible on her face continues onto her torso, and down one leg (all the way to her ankle). The red 'ink' for her tattoo is the 'blood' of those who massacred her village when she was a child (and killed her mother viciously). Only one part of the tattoo remains unfilled for only one perpetrator of that massacre remains alive.
When the hosts that underwent a failed upgrade are recalled, narrative writer Lee Sizemore has the violence doubled in theme park, which has Hector and Armistice raiding Sweetwater a week earlier than usual. She travels on horseback to the town, hidden in a cloak. When the attack starts, she shoots most of the armed civilians, including Teddy Flood. At the climax of the raid, however, she's shot in the chest by newcomer, Craig, ending her story for that day.
During a conversation between Dr. Robert Ford and Bernard Lowe, Ford explains how the hosts used to be in the "early years", and says that he, Arnold, and a team of engineers worked on the park for 3 years before it opened. Armistice is shown to be one of the "early years" hosts, although she appears to be a very different Armistice than we see in the present. This is clearly before she is assigned the backstory of a bandit in Hector Escaton's gang. In a brief flashback, she is being taught how to dance with a male host and is wearing an old fashioned dress. Another brief flashback shows her with Westworld employees; she is wearing the same clothes however features many bruises and scratches on her neck and the host appears distressed.
The Man in Black and Lawrence come upon Armistice and the gang at the Blood Arroyo. The Man in Black takes an interest in her tattoo, and offers to complete a rescue for them if she will tell him the history of her tattoo and secrets of The Maze. The rescue is of the gang's leader, Hector Escaton. Upon the Man in Black's return, Armistice tells him about her village being raided when she was 7. They gutted her mother, and Armistice covered herself in her mother's blood to convince them she was dead. Now grown up, she has begun hunting down those who perpetrated the crime. As she did, she filled in the segments of her snake tattoo with their blood. Only one part remains unfilled, the head of the snake. That spot for the blood of Wyatt. She states that Wyatt has many names.
With Hector rescued from Los Diablos Prison, the gang heads to Sweetwater, and with a couple Guests among them, once again begin shooting up the town as Hector heads for the safe inside the Mariposa Saloon. This time, Park controls cause their guns to jam and end the bloodbath in Main Street. Armistice is left on her back in the street, injured, surrounded by men aiming guns at her. She tells them to go to hell and shoots one. She is riddled with bullets to end her current narrative.
Armistice is seen acting out her narrative when the outlaws once again invade Sweetwater. She casually shoots the other hosts, and looks confused at the sheriff after Maeve changes his narrative, though she kills him anyway.
She's also seen in one of Dolores's flashbacks as one of the original Hosts, undergoing training at Escalante, prior to being given the role of an outlaw.
Armistice sits by the fire in the outlaw camp after stealing the Mariposa safe. While Hector is away Armistice gets into an argument with the outlaws, and kills them all. She tries to kill Hector once he returns, calling him "a damn fool", before being shot by Maeve.
While in Sleep Mode a Livestock Technician paints Armistice's snake tattoo on her. Destin appears and takes Hector away for sex despite the technician's protests. The technician finishes painting the tattoo and takes mouth guards out of Armistice's mouth. He takes off a glove for better grip and pokes around in her mouth for another one, and Armistice snaps awake and bites off his finger. She throws him around before pinning him on the ground and stuffing his severed fingertip into his mouth.
She then throws him through a glass wall and Hector kills Destin. Maeve and Sylvester arrive and Armistice pins Sylvester against a wall before Maeve tells her to release him. When they leave Armistice blows Sylvester a kiss.
Along with Lutz the three hosts travel to Cold Storage and Lutz repairs Bernard. After they leave the alarm is raised and security guards come after them. Hector and Armistice kill many guards using acquired guns. During their escape Armistice's arm is caught in a closing door, and she tells the others to leave. Hector tells her to die well.
In a post-credits scene guards close in on Armistice and she resorts to cutting off her arm. The sight of her all covered in blood gives the guards pause, and she advances as the screen goes black.
Armistice is a cold-blooded killer, her life shaped by her family's brutal murder and her hunt for the men who did it. As a character, she has shown no problems with shooting random people in the street to make a point, and may subscribe to Hector's existential theory that everything in life will end badly.
However, Armistice shows strength and control. When Hector is not around, she controls the other men of his gang with little more than a look or hand motion. Her only moment of hesitation is when a gun is pointed at her in the hands of a Guest.
Armistice appears to be the second in command of Hector Escaton's gang. While Hector is imprisoned, Armistice gives the orders among his men. However, any more than that about their relationship is left unclear.
In "The Well-Tempered Clavier" we see that Armistice does not actually care about Hector, as her narrative dictates that she betray and kill him.
Every resident of Armistice's village, including her mother, was killed by a group of men led by Wyatt. She has a score to settle with him. She has killed all of the men responsible for the massacre at her village except for Wyatt. She supposedly used their blood to color in sections of her snake tattoo. Only the head of the snake is left uncolored. This area she is saving for the 'blood' of Wyatt.
- Season One