Board Thread:General Discussion/@comment-35684540-20180526162918

What was Luke's fatal flaw? I think it was like an unstoppable rage or something? In my opinion, Luke's fatal flaw can be grudge, because it fits well, but I do not know what was his fatal flaw actually. I do not remember well. So, If you guys remember, can you tell me what was it please?

And I think Nico's fatal flaw is not a grudge despite the fact it was in the series, I think his fatal flaw is actually self hatred in my opinion. What do you guys think? 