A great demon who emerges after ten thousand years of being sealed has a mindset quite like that of a criminal finally released after serving a ten-year sentence:
Though he has stayed the same, the world has changed. He is filled with resentment, but has nowhere to vent it.
He hadn't planned to pick a fight with those detestable humans, but they keep coming after him one after another.
A princess of a great nation, a female warrior disguised as a man, a shaman pretending to be crazy, an assassin who loves dirty jokes...
Seriously, could you all stay away from me?