For real? No offense, but the colorful hair was a dead giveaway. I knew she was an innovator the first time I saw her, really I did. But turning on CB, I didn't see that coming, I thought she was another Terria at first, until I found out she was spying on them, though she was the first one to alarm everyone that there might be a spy on board.
But unfortunitely we missed another twist in episode 19's epiloque.