The Divine King and Dragon King are straightforward, both are good things.
But Lord Demon King's title is a bit ambiguous.
On a positive note, Lord Demon King is the last Witch King, and she will forever lead the Witch World invincibly.
But, is there really anything everlasting in this world?
So, the title of King of the End for Lord Demon King might not be an auspicious thing; perhaps it means literally, that the Demon King will be the last Witch King.
More bluntly, the Witch World will head towards the end in the Era of the Demon Lord.
As for how it will happen, it might be due to some terrible calamity, or civil strife, or perhaps being annihilated by other races.
Of course, it's more likely to be destroyed by Lord Demon King herself.
The Demon King of the End, this might not refer to the Demon King known to the witches now but another more straightforward meaning.
The final boss, the villain who destroys the world, the ultimate Great Demon King or something.
