I really don't understand why the Beast King is such as asshole. I get that he's a battle junkie just like Kelvin, but there seems to be something more to it. I can't tell if it's evil or just insanity.
They aren't wrong that people can get weird ideas in their heads in abusive relationships, but to decide that completely one-sidedly about two people you know basically nothing about, then try to do something forcefully like that... Awful.
@reijing Constructive interference that he mentioned is a thing. Obviously the power needed to obliterate a creature isn't able to be produce by a human, even with constructive interference, but at least they're trying to explain it a bit.
@Thirst_420 This would make sense. Alternatively, the devil was actually manipulating everything from the beginning (such as a bee flying on the saintess' cheek at just the right time) because he really did fall in love with her right after forming the contract.