Granger… he had never heard that name before. It did not belong to one of the old pureblood lines. And that was always good. Maybe they kidnapped her too. Maybe this girl, Hermione, knew a way to get away from here. Or at least could tell him where “here” was.
He led the package in his left hand fall to the ground to use his now free hand to pull up the right sleeve of his robe and shirt. Without taking his wand off her, Sirius lowered his wand hand and turned the inside of his arm upwards, so she could see the blank skin. He touched the left sleeve with his wand and it mimicked his partner. Again, he turned his arm around for her to see. As his elbow brushed the name tag on his chest, he cursed himself for not taking it off. Great way to shout out your name, Black!
“Your turn”, Sirius demanded and pointed towards the girl’s arms.