King and Ban have been at each other's throats for hundreds of years. They always have been and they always assumed that they always would be.
Yet recently they've been more tolerate with each other?
This is due to them finally seeing each other in another light.
You see Elaine had met the devil in the second world and she gave up half of her fairy soul for just one wish.
"Please. I wish that the people closest to me would stop hating each other and do what I asked of them from the start. To look after each other, and let them finally see each other in another light." She spoke softly and the dark figure nodded.
Half of her light soul was sucked out of her and the wish was granted.
And from this day Ban and King had started to see each other in another light. But it wasn't the light Elaine had wished for.
It was the light of the devils doing as they see each other not just in a caring light but now in a deeply caring light.
Was this what Elaine truly wanted, even if it makes her upset, she's happy that they're finally happy and have moved on, even if it's with each other