Editing to fix that last part.
[Ciel's not doing much better, the onslaught of the emotions he never wants to feel ever again (helpless, useless and degraded beyond all comprehension) leaving him stunned and somewhat shamed.
He does, however, have enough presence of mind to draw the parallel between what just happened and the feather that this other person is holding.]
You're shaking. [Ciel manages to get out, approaching this stranger. He wants to leave, now, but he'll need to retrieve that feather first.] Drop the feather and sit down before you hurt yourself. Do you require any assistance?