They fit together like two puzzle pieces. Where each personality had an opening the other had the piece to fill it in.
Now Hermione was left to stare into the empty eyes as she felt the pieces of her heart that he had filled break into a million pieces.
Her puzzle would now remain marred and forever unfinished, for with his death not only were his pieces gone but he had taken most of hers along with him.
She laid there with him, one last time, pretending she was still whole and complete, but his lifeless form, his joyless body, held no comfort for her as she fell into darkness.