Griever or girl? (Maze runner)

Test subject 12 never had a family or was sent up into the glade. She worked with w.c.k.d she was the one who sent all the boys into the glade.

She was referred to 'subject 12' since she was the 12th person to be recruited into w.c.k.d. She never had a family and her mother died giving birth to her. Subject 12 never had anyone except doctor Ava Paige.

But one day dr. Ava paige decided to send her up into the maze, but not in the glade, in the grievers home...