First pick at least two(2) supporting characters from the novel that would be described in the real world as being (in social terms at least) "normal.

Christopher's father Christopher's father looks after Christopher, knows all his habits, and understands the way Christopher works, but when he finds out that his son is trying to solve who killed Mrs. Shears' dog he becomes unusually angry and impatient. We wonder why this seemingly "normal" father, who understands his son's condition, could become so angry with him. He also lies to Chris about his mother being dead. Despite being "normal" Judy Boone, Chris's mother, has her own social and emotional problems. I think that, unlike Chris, both parents twist the truth to suit an emotional context that is not always healthy.