As soon as he feels the robe tug, in a way that was very much not a result of his own struggles - plus this woman's voice suddenly being so close - Arthur wrenches it out of her grip and jerks back a few steps with a sharp bark- "Don't fucking touch me!"

Which looks stupid when he's still half wrapped in the robes, but he pulls the rest clear and throws it to the ground as fast as he can, and staggers back a few more paces just in case. "Look- you have clearly already observed I'm fucking blind, don't just grab me, for- for fuck's sake!"