Brandt is one of the humans who live in the caves found by Jeb. He is described as not being very big, but very muscular.
He was shot by Wanderer's Seeker, fortunately for him the bullet just missed his heart and lungs. Doc used Heal, a soul-made medicine for human bodies, to heal the bullet wound in Brand's shoulder. When the Seeker is brought back to the caves, Brandt is one of the men who guards her, along with Aaron.
In the movie he and Aaron crash their van in after a drawn-out car chase to protect the resistance. They die doing so.