Doll

Doll is an interpretation of the Quiet One trope — introverted and taciturn.

Doll rarely spoke to anyone, talking occasionally with her best friend, Lizzy, and giving enigmatic non-answers to questions anyone might have. In addition to being quiet, Doll lacked any interest in expressing herself to others under the assumption that no one understands how to help her. When first confronted by Uzi, Uzi tries to talk her into moving on, responding to Uzi's attempt at persuading her by saying she doesn't need help, implying she doesn't choose to listen to anyone.

Beneath her facade of an introvert who prefers to keep to herself are deep psychological problems resulting from seeing her parents killed and eaten at a young age by Serial Designation V. This aftermath resulted in Doll becoming hellbent on killing Serial Designation V as revenge for the deaths of her family as she does anything to achieve her goal, even resorting to murdering some of her fellow Worker Drones. Furthermore, Doll has shown herself to be both determined and deadly, but she has also proven to possess keen perception and quick thinking in challenging circumstances.

Despite being undeniably persistent and murderous, Doll has shown to have a grasp of some morals and sympathy for others. For example, she cares about her fellow Worker Drones, particularly her friendships with Lizzy and Thad. Regardless of the fact she doesn't like to express herself, she can relate to anyone who has faced similar situations akin to hers, particularly with Uzi.

However, before her death, Doll was revealed to be more of an anti-villain, as her true goals was to obtain the patch and use it on herself and presumably Uzi to prevent the Absolute Solver from using them to destroy the planet, but by the end, her efforts go in vain as she is jumped and gutted by the Solver.

Although Doll once laughed at the fact that Uzi had survived an explosion caused by her railgun, Doll can relate to Uzi's situation and offers to help Uzi through her struggles. After she is given the Keybug from Uzi, Doll tells Khan on her way out that he "raised a good daughter." Doll can also be helpful to some extent as when her body shuts down due to her injuries caused by Cyn, her last words to Uzi are to "fight back" in Russian.