It would be nice if Mishu had something that actually gave her power, so that she could do this. The little apparently-powerless person exerting power, with high stakes on both sides (they could kill her; she could refuse to repair the whatsit or translate the whatsit or whatever) could be pretty cool. Highly flavored.
Yes, but... what is she going to do for a guide dog now? Doesn't he need time to heal? I mean, isn't she pissed off? Doesn't she kind of want him to be hurt? (Not broken shoulders and hips, maybe, and maybe not beheaded, but hurt. Punished. You know? If it was my direwolf guide dog(wolf?) I'd be pissed. And then there's all the other stuff he did....
Ooh! Good idea! Create more tension that way. Maybe Mishu could say, "You stop horribly killing him right now or else I won't help you with [this or that]!" And if they threaten to kill her too, she says something like, "I'm the only one who can help you. Kill me, and you'll be right back where you started!" Aaah, now I understand. At this stage, her dog is injured and M.I.A. so she's probably not going to be very empathetic to the man. She probably expects a flogging and is shocked at the brutality of the actual execution. Another idea, what if the agent knows where her guide dog is/knows information she needs so she CAN'T afford to have him die.
And it explains why she'd care about this bastard at all. I mean, were I in her shoes, I probably wouldn't care WHAT they wanted to do to him.
