If he hadn't met that angel that night, would everything have changed?
If he had never fallen in love with the Elf King, would everyone be safe from harm?
It's a pity that there is no "if" in the world, even if he is an omnipotent angel, he is an omnipotent elf.
The head of angels in the west, the king of elves in the east.
Lingering love, cruel calamity.