John very much takes after his father -- stubbornly set on his ideals -- even if this was a city of crimes, and even if his father met a gruesome end. His mother had been devasted by the death of her husband and hoped only for a safe mundane life for her two children. Look at how that turned out. One ran back to her street urchin friends after stealing from his family, and the other had disobeyed her only wish, entering the police force the moment she had passed.

John feels very conflicted towards Poppy. He hated her for violating his family -- his mother -- with her crimes, but he also loved her for being a good sister and daughter before that. He also felt something like a relief or gratefulness that his mother was no longer there to suffocate him. How he feels about Poppy doesn't matter anymore, since they haven't seen each other since the day she ran away and they are half a city apart. （Yes, he has heard some chatters about a red-haired mafia boss who has taken a particular liking to orphaned children) However, some of the days, the brilliant girl would visit his dreams, leaving him to wonder what made him feel so empty when he woke up.

It has been over a decade since he joined the precinct, but there is a reason he remained only a detective. His hotheaded unbending personality didn't do him any favours with both the good and the bad cops.

His shots are as steady as his will to shoot. In other words, if he wants to deal a lethal blow, he needs to believe that person is bad and needs to be dead; if he wants to disable someone, he needs to wholeheartedly agree that that person needs to be disabled at that moment. Otherwise, he would miss his intended target.

The shot itself still follows the laws of physics -- the target must remain within line of sight, the bullet cannot deal more damage or reach a greater distance than its effective distance, etc.