Yeah, I don’t think Hearthstone had the Happiest Childhood. Even if his Ending was relatively happy (I haven’t read it yet, at the End of HoT) he still had such a terrible childhood that nothing could completely make up for it.
Yeah, I'll have to say Hearthstone. Just because all of the things his father did to him as a child, and the fact that his father, brother, and mother are all dead.
@/Dylan: I spent so much time deciding between them, Hearthstone had the worst childhood but the series just seemed like it was trying to put Nico through as much awful stuff as possible