As the maiden said, there is always an ending. 

Fengye observes the struggle. First, without comprehension. Next, without motivation. Finally, without indifference. 

"Maybe..." she croaks. "Maybe you could find some better rocks inside your head."

She is tired. She is sore. She is feeling more than a little bitchy and all of these problems and more are down to being punched out by this demon. But... she is free, in two important ways. She is freed from effort, knowing that she is helpless. Even against such a captor she can relax knowing there is nothing she can do. Not a freedom she's unused to, except for how it interacts with the second: Freedom from decorum. In the Flower Kingdoms, in the Dominion, there are endless hierarchies. A scribe could never draw the eye of a princess knight. A mortal could never defeat one of the Dragon Lords. But even a pathetic, broken girl might insult a demon lord without consequence. So Fengye, humble Fengye who had held onto her wroth quietly for so many years like a good little immaculate, finally got to let a little bit of it out.

"Because I seem to remember that you had plans to invade," she said. "And that would have been something to see: the legions of hell starving to death because their general does not understand the basics of rainforest supply logistics."