Here is a tsundere of the story, Odsyn, another chosen. She is mostly like that when she has to be smart about something. Speaking of smart, she works with the scientists to help them out.

Past:

     When she was little, she wandered around with Cither. No food, no water, nothing. A worker at W.E.A.P.O.N saw them and instantly took them to the building. She was smarter than almost everyone there, that amazed all of them.