Character Analysis: Devin

Devin is the main protagonist in Joyland. He encounters a murder mystery at an amusement park. I feel as if he worries too much. During the novel, he runs into his ex. From what it seems, through author Stephen King's genius third person storytelling, he's too jittery. You can never tell when he steps in and for a main protagonist, he doesn't get much involvement in the story. I should see him more, or at least the text should give me more indication of seeing him more. He reminds me of a cat. He seems noble and with authority, but he seems to run away from certain situations--big situations.