What are the major themes in the book Tangerine by Edward Bloor?

Tangerine is full of potential themes that could be classified as "main" themes. One such potential theme is the theme of appearance conflicting with reality. This theme can be explored through Erik Fisher. Erik Fisher is a horrible person. He is a bully through and through. He is the reason that Paul has eye problems because Erik and his friend sprayed spray paint into Paul's eyes—yet he was allowed to get away with it. Erik's parents and the school think that he is a golden boy of a child. He can do no wrong, and Erik knows this. That's why he is able to turn on the charm whenever is necessary. Readers know that he is sadistic and not remorseful about his horrible actions, yet nobody else seems to grasp that reality. He appears to be perfect simply because he can kick a ball well and turn on the charm whenever is necessary.
This dominating presence that Erik maintains leads to a theme of fear without understanding. Paul fears Erik. Paul isn't quite sure why, but that fear is always there. Paul knows Erik isn't what he shows to their mother and father even if he can't remember exactly why, and that leads readers to another main theme that deals with lost memories and recovering the past.