Is Brinker Hadley a dynamic or static character in the story? Can you give me an example showing the details of the character's behavior?

I think Brinker remains static. He doesn't change much
throughout the story. He wants to see Gene confess his crime about Finny in the Butt
Room in chapter 7, and then pushes it again in chapter 10 &
11.

He's a smart, tough guy the whole time who wants to
enlist when the time is right. That fits a tough guy. He is also a moral character, he
wants truth to emerge.

He is not a flat character, as
mentioned above he has many qualities or traits. Brinker takes on the whole crew at
the Winter Carnival when they try to steal the hard cider. This too matches his tough
guy mentality.