I think this thread is just going in circles now.
None of us can with certainty say what will happen with Guts and Casca when her mind is returned, although it is fun to theorize ofcourse and I do not fault Truth for speaking his mind. However @TheAwfulTruth you seem to be hellbent on proving your theory and projecting your own biases onto the story. Furthermore your understanding of character motivations seems rather completely skewed.
Edit:
Sorry for being a bit of a dick, didn't mean to put a damper on everything.