The Hard Way.

Danah refused to take his well-meaning advice. Her already buffed body expanded further. She became a giant more than 100 meters tall. She also grew two more pairs of hands. One pair is above her normal arms while the other is beneath it. She also grew a pair of large white wings. The white feathers on her wings each bear a single red eye. So her wings are full of eyes. Then she rushed towards him.

The smile on Ragnarok's face died down. He frowned when he sensed her ability. "I take it back. I will not make your death peaceful at all. It will be as painful as it can be."

Then he ran away from her. Danah has decided to make things difficult for the two of them. He has to actually fight her and struggle to kill her. She won't get a painless death because of her stubbornness. He will make sure of it.