I was about to suggest Battle Angel Alita and Ghost In The Shell (the mangas) but yes, Heinlein has precedence. Iain Banks's Culture novels contain quite a bit

I was about to suggest Battle Angel Alita and Ghost In The Shell (the mangas) but yes, Heinlein has precedence. Iain Banks's Culture novels contain quite a bit material on cross-body consciousness as well and what that means for individuals.