Personality

13 seems to be quiet and reserved. Still seeming to be not very outgoing even with the people she's close to. She can look to be a bit paranoid at times too, constantly seeming to find the worst in situations and using that as an excuse to "protect herself". She does tend to be less paranoid or terrified around her close friends, but has bits of just wanting to isolate away from them. Despite this she seems to be very sweet and caring, even pushing away her fears to help out her friends, though she doesn't usually extend this courtesy to those she doesn't know.

Backstory

13 doesn't remember anything about her life, not even a name. She just remembers being in this care facility, being referred to by the number on her jacket, 13. During her time there, 13 meets two others, 12 and 14. Somehow, those two made her feel safer in this place she has suspicions about, so she was happy to stick with them and becoming pretty close to both of them.

Though one day her safety was taken away from her. On a day that 12 was taken for "check ups" he fought back, eventually his body going to change into his transformed look. After seeing that and losing her friend from being put into isolation, 13 started to become very paranoid, shutting herself in her room only letting 14 in occasionally. Though unfortunately things would not end well for her. As when some of the caretakers come in to check up on her, she freaks out, and the stress causes her unstable DNA to mutate, as she grows in size and has some animal like features appear, much like 12 did. And like him, they had to sedate her and put her in isolation.

Eventually, she was freed by 14, who like her and 12, had also changed appearance. They took her and 12 and decided to break out of the facility. The three worked together to get out of there, eventually becoming free, where they vowed to stick together, to never let something like that happen again.