The memory of Fred's smile beckons George with light. His half and the half that belonged to his brother. But so only as an old collagraph, yellowed over the years.

Azkaban washes away the boundaries of feelings, erases all principles, all views on life. When he returns to Grimmauld Place, Sirius suddenly realizes that hatred has also been erased under the onslaught of the prison's damp walls. Or maybe it was replaced by even more terrible feelings - bitterness and regret.

Notice Regulus Black, and you'll see how broken he really was.