Chuck

In "The Maze Runner", Chuck was the last Greenbean before Thomas and the last one welcomed by Nick. He was the first Glader to befriend Thomas, to show actual interest in him and to actually talk with him. The two became good friends, and when Chuck came to the Slammer to visit Thomas, the latter promised to get Chuck home to his parents.

When Chuck entered the Griever Hole with Thomas and Teresa during the Gladers' attempt at escape, he was the first one to figure out that Teresa had to push the button right when the Grievers were about to attack them. After all of the Gladers escape through the Griever hole, they encounter Gally, who throws a knife at Thomas. Thomas could only stand there, too startled to do anything. Right when the knife was about to collide with him, though, Chuck dove in front of the knife, which stabbed him in the chest, and died in Thomas's arms.