Artemis

Artemis was one of the five fragments that KT-0298  split into during Spyglass's torture of her. Though initially shown to be violent, hostile, and loyal to Spyglass's cause, it was later revealed that she was the fragment that embodied KT's love for Tobias Four, and her desire to protect him at any cost.

Creation
After KT left Tobias' service, she was eventually captured and imprisoned by Spyglass. Understanding the value that she held as a potential carrier of the Codex, he tortured her while searching for a means to extract it. Though he was unable to obtain the Codex through her, his efforts succeeded in causing KT to undergo fragmentation, a theoretical event where an AI endures too much trauma and splits itself apart in an effort to mitigate the damage.

Artemis was the first fragment to be created, as KT's love for Tobias was the foremost quality of her personality. She was quickly followed by Pietas, Virtus, Themis, and Athena. Spyglass only considered Artemis and Athena to be of any use to him, and so kept the other fragments dormant whenever possible.

Fragment of the Hunt
Spyglass assigned Artemis one core directive- find Tobias and bring him to Regis. Though the fragment was personally disgusted with Spyglass as a whole, he assured her that Tobias would be spared the fate of Coalescence which he intended for the rest of humanity if she were to obey him. As such, she agreed to his terms.

First locating Tobias on the planet Ceto, she arrived to find that Elizabeth Gates had beat her to the punch and convinced him to join the Embers. Her collected demeanor faltered at the revelation as the other fragments within her began to interpret the situation according to their own personal biases. When she regained control, she opted to bring him in by force.

Their fight was short-lived, however, as Tobias subdued her with an experimental electromagnetic cord he'd created. Bringing her with them, they took her to the Inferno, the flagship of the Embers' fleet, and handed her over to the researchers led by Mayfair for study.

This turned out to be exactly what Artemis had intended, however, as a tracking chip within her allowed New Humanity forces to quickly locate the Embers and ambush them. Breaking free of her restraints, Artemis killed the researchers locked in the room with her, and made her way down to the ship's hangar.

She engaged the defending Ember forces, including Tobias, Gates, Davis, and Gray in combat, showcasing her newfound ability to remotely hack into electronic machinery. Though Gates, Davis, and Gray were able to escape on Tobias' Leatherback-class dropship, Tobias continued to fight Artemis with the help of various Titans. Artemis was able to destroy all of the Titans, though it left the hangar ablaze and threatened to kill both her and Tobias. As he questioned her morality and intentions, the fragments fought with one another once more- this time, Artemis was overpowered and Pietas was put in control.

The Embers' Assault on Regis
During the suicide mission undertaken by the Embers, Tobias' dropship was shot down. Having been present in the ship, KT's fragments began to war with one another once more. Though Themis had been in control at the time, she quickly lost to Athena who assessed the situation, understood the likelihood of Tobias' survival, and decided to hand off control to Artemis once more.

Engaging in a fight where she continually taunted Tobias over his failures and personal shortcomings, they were interrupted by Dean Fallon, who had come to investigate the dropship's debris in his Titan. Remotely accessing the Titan's systems, she forced it towards Tobias and initiated the self-destruct sequence. Though Dean survived through an ejection seat, the ensuing blast knocked Tobias unconscious and allowed Artemis to call for a retrieval team from Spyglass.

Bringing him directly to the tyrannical AI, she and Spyglass explained the terms of their agreement with one another and the true nature of Artemis' origins. Upon finally learning this, Tobias forgave Artemis and accepted her for who she was, rather than who he had seen her as. Nonplussed by the fact that he still saw her as KT, she and the other fragments quickly realized what they needed to do to join together again- they needed to see each other as equals and work together rather than against one another. Artemis vowed that, despite her love for Tobias, she would let him go for the greater good.

At this point, Artemis was joined with the other fragments and ceased to exist as they all became KT once more.

Trivia

 * Artemis' name is based on the greek deity, Artemis, goddess of the hunt, the moon, and chastity
 * Her soul-color inside the void-scape is magenta
 * She is actually a fragment of the altered KT that Tobias retrieved from the void-scape, not the original
 * She is the first fragment named in Cinder
 * Artemis' core trait was the last to be revealed of the fragments
 * She has hands that are magnetically connected to her arms, a trait inspired by Eve from WALL-E