They have bonds with many people in their lives.
Those bonds were definitely not false and couldn't be erased so easily.
So by not taking missions that required killing, Arya felt much more relieved. Besides, with her identity in the open, as long as she didn't take on killing mission, it would not matter too much even if others were to know her identity.
There was no evidence and no cases that could link her with the crimes.
Just like Aries.
Even if she were to walk to the police station, she would go out in less than a few hours. It was nothing more than coming over to drink a cup of tea and then left without hesitation with all charges cleared.
Moreover, Aries hadn't taken any silencing mission again and lived a comfortable life.
She just needed to gather information for Leo from time to time and he would be the one to deal with it while she was only responsible for cover.
Bang!
