Nilin, her parents, and Edge.
And since I'm already using the spoiler tag... the scene towards the end where you make your own father believe he was responsible for the death of his own daughter, that was really something, that made me pause. Now if the overall game was a bit better, the overall narrative a bit more compelling (to me), that would have been a truly powerful, heart-breaking scene.
As a side note: you realize you're not that young anymore when you're starting to identify with the fathers of the characters.