Frank can't hide the way his expression changes at hearing her name, and he doesn't try to; he's not trying to hide anything from her. Peggy Carter. He isn't one to get star-struck, exactly, but that's an altogether different sort of unexpected, and it catches him a little off guard.

"Frank Castle," he says with an offered hand, because hell if he's going to meet Peggy Carter and not shake her hand. "Seems so, ma'am."