What literary techniques are in The Green Mile?

Symbolism:

All the guards on E Block carry a baton but Percy is the only one that has a custom holster for his. Paul mentions this multiple times, finding it ridiculous. The fact that Percy has this custom holster is symbolic of all the ways he is unfit to work on E Block. Percy is sadistic and loves exerting control and power over others. His baton is a symbol of his power and Percy wants to highlight its importance by having a custom holster. While Percy is proud of this, it only serves to demonstrate his inflated sense of importance and a lack of understanding of the true responsibilities the guards on E Block have.

Simile:

To emphasize his size, Paul uses a simile saying the guards “looked like children walking along with a captured bear.”

Metaphor:

“If it would get rid of Percy Wetmore, I’d tweak the devil’s nose,” meaning Paul would take almost any risk if it means getting Percy out of the prison.