Madeline

“If you're going to decipher a hidden code from a complex set of different mazes, I'm pretty sure you need a girl's brain running the show.”
― James Dashner, The Maze Runner

“He pulled the envelope out of his pocket and ripped it open, then took out the slip of paper. The soft lights that ringed the mirror lit up the message in a warm glow. It was two short sentences:

" KILL ME. IF YOU'VE EVER BEEN MY FRIEND, KILL ME. ”
― James Dashner, The Death Cure

“KILL ME!" And then Newt's eyes cleared, as if he'd gained one last trembling gasp of sanity, and his voice softened. "Please, Tommy. Please."
With his heart falling into a black abyss, Thomas pulled the trigger.”
― James Dashner, The Death Cure

“All the same, Thomas now had a plan. As bad as it was, he had a plan.
They needed more clues about the code. They needed MEMORIES.
So he was going to get stung by a Griever. Go through the Changing. On purpose.”
― James Dashner, The Maze Runner