Yassen was Yassah first. His parents loved him. And they sacrificed their lives so that he could continue to be alive.
Then he escaped to Moscow from a failed Russian experiment on chemical weapon. Only to be caught a thief and enslaved by a horrible man.
A person is sometimes, the product of his experience. How one react to the shit part in life, would determine what kind of person he became.
Is there enough goodness in a person to resist the rotting nature of interaction with selfish, nasty humans?