if he really is a god (or whatevs) then she probably cant overcome him, though she might give him a run for his money
The only super dramatic death scene I can think of is making himself kill the FL by accident and drive him to such strong self hatred that his powers activate on himself.
He like decides the “fate” of anyone if he wishes, so his “fate” value is probably on the level of a god
From what I read so far, the Girl has no chance. As soon as she shows killing intent its over in a blink.
Can the girl with the ability "just world" stop the mc's powers? Unless the mc's "fate" value is too high for her to affect him