Kakashi might have been mistaken, but he could have sworn Kushina's hair gave the slightest little lilt as her voice growled; a weak attempt at the usual firey flare it typically had, but a reminiscent trait none the less. Even her voice sounded different, like she had a sore throat almost.

"I know because I've only been back in this body all of a few hours.." he said, putting a hand to his chest, over a small bump in his flak jacket that wriggled when at the contact. "I switched with a complete stranger too."