There was a term in theater to describe this type of symetrical irony. There had to be. Inara simply couldn't think of what it was.

Mal didn't like to talk about himself, his past, how he grew up, what brought him to the war...and Inara had always given him that distance because it was something she required herself. The things she knew about him were few, but one of those few facts that she did know was the place where he hailed from.

"...Shadow is your home planet."