Frypan

In The Maze Runner, Siggy is first mentioned by Gally and Chuck to be a little ill-tempered. However, he actually seems to be friendly enough. He later grows to be a good friend of Thomas and speaks up for him during a Gathering, along with Newt, Minho, and Clint. He is the Keeper of the Cooks in the Glade, or maybe the only one. The other Gladers joke about the food he prepares being horrible stuff, but the truth is that Frypan is a very good cook and they enjoy their meals. It is said that he is the last Keeper to agree to follow Thomas into battle. He escapes with the other 19 survivors.

In The Scorch Trials, Siggy appears a few times, talking occasionally to Thomas, Winston, Newt, Minho, and Jack. He is only made notable when helping Winston leave the Flat Trans. He is also the one who spots Thomas and Brenda in the Crank City when they are trapped in a dead end. He witnesses them being threatened and forced into a basement party by three Cranks (Blondie, Tall and Ugly, Ponytail) and together with the other Gladers and Jorge rescues Thomas and Brenda.

In The Death Cure, Siggy originally chose not to get his memory restored, but a short time later he changed his mind. He is not seen afterwards until he and the other Immunes meet up with Thomas in the Maze. He then runs with all of the others and escapes into the Flat Trans.