Han Sen was a Duke and he wanted to tame that blood kirin. Fox Queen thought that was a ridiculous notion.
The blood kirin was as exemplary as a King could be. It might not lose a fight against a half-deified being, even. And on top of that, it was the fostered son of White Bone Big Hell. That was its home turf, and that could see it buffed by belonging there.
It was lucky that Han Sen was able to make use of that shield of his to stay alive, but Fox Queen thought it was an absolute joke that he wanted to try and tame the blood kirin.
But since she had nothing else to do, it might have at least helped to stave off boredom for a little while.