In the last chapter, Cole and Peter learn that life is in many ways a circle. How was Cole’s personal growth connected to that of the three other characters?

THere are more than three minor characters. Can you be more specific?

Garvey, Edwin, and The Keeper I think (:

The other three characters are pretty much static. That is they don't change through the novel. All three knew about the whole circle of life thing long before they met Cole. They function as mentors and facilitators to help Cole realize his anger and begin the healing process.