The Dark Knight Rises scene with John Blake: "Not a lot of people know what it feels like to be angry, in your bones. I mean, they understand, foster parents, everybody understands, for awhile. Then they want the angry little kid to do something he knows he can't do, move on. So after awhile they stop understanding. They send the angry kid to a boys home. I figured it out too late. You gotta learn to hide the anger, practice smiling in the mirror. It's like putting on a mask."
As we have talked about in the past, in Yoru no Nai Kuni the lead heroine Arnath will have to choose between either saving her beloved friend or fulfilling her duty as a Holy Knight, meaning sacrificing said friend.