She watched as he pulled the coin out of his pocket, admittedly on guard and watching him with both interest and wariness. Pietro had told her once that he could outrun anything that was a threat them; she felt similar about her own powers. She could destroy almost anything that was a true threat to them. But she wasn't vain enough to know that there were people in their own world, and particularly here, who were far stronger than she and Pietro combined. She didn't know this man. She didn't assume he wasn't one of those people.
Admittedly, as he worked the metal with an ease and a grace that she was enamored with, her guard dropped a little. She knew what it was to make something outside of yourself a part of you, to mold it to your will -- and she knew enough to know that, even at this small of a scale, he was powerful.
When he offered the small sphere, she took it delicately with her powers. It glowed red for an instant before landing in her opened palm.
"You manipulate the metal," she said, statement of fact.