The last Girl Gally x OC

Elena is a girl in the Maze the only one but also the first one to be in the Glade. Elena is a girl that is stronger then Gally. And that connected them. But the first time the Gladers where getting to see Elena was because of Thomas he saw here when he looked into the Maze at his bonfire. Elena had to safe Thomas for going in the Maze but then the Gladers see her for the first time....