The Question and Answer section for Tangerine is a great resource to ask questions, find answers, and discuss the novel.
I think the zombies represent Paul's past. He can't remember how he lost his eye site and he does not quite believe his parent's explanation. His past haunts him.
Louis is the opposite of Paul's big brother Eric. He takes care of his family and is passionate about his orange groves. Paul feels an instant connection to Louis: he is the big brother he wished that he had.
Victor says, "If you goanna play with us you goanna play with us. If you're a War Eagle you're a War Eagle. You got brothers to back you up. Nobody's goanna mess with you, not anyplace, not anytime."