Board Thread:Theories and Rumors/@comment-38341027-20190719231911/@comment-30938718-20190720135439

The Overlord didn't have a proper name and he was the main villain, not Kozu or Cryptor. Your theory doesn't realy makes sense, a villain doesn't need a proper name, most villains don't even do and that is why they're so good villains. And again, I can't see a ninja becoming a main antagonist.