It's Stocke. She's latched onto Stocke. Who would very definitely have something to say about this if he weren't worried about other things right now.

He curls over his human, trying to shove both of them to the ground and make them smaller targets, but Amelia's flapping jerks him back upright almost immediately. The shade's crackling goes a bit louder - if he didn't have the human with him, he'd be perfectly fine with vanishing into the shadows and leaving Amelia with the fallout. But right now that's not an option.

So what he does is yank back hard. If Amelia lets go, all for the better - she'll make an excellent decoy. If she doesn't, she'll probably go down with him, where he'll hiss in her ear, "Truce." Hunters first, then back to fighting.