You swap bodies with your favorite bleach character. How does the plot change?

Like for example, my favorite would be Rangiku (because reasons). Me and her swap and you gotta know how the plot of Bleach changes.

Toshiro has an hardworking assistant (to his surprise now) and Orihime gets new abilities due to me teaching her.

So yeah, stronger Orihime is what happens.

Who do you swap with and how does the plot change?