Theon comes to grips with his identity in the moments leading up to the Battle of the Bastards, locked away in a kennel at the Dreadfort.
During his third tour in Afghanistan, John is a prisoner of war and is forced to play Russian Roulette. Thereafter, he finds comfort in the act of putting a gun to his head and pulling the trigger.
Harry suffers a trauma at the hands of Vernon Dursley. When Severus is sent to check on the boy, he finds more than he ever expected to.