I think she'll always be their princess...
Byakuya, Ichigo and Renji I think will always be at the ready to protect her cuz she's special to each of them in a different way.
Byakuya- cuz she represents the promise he would have kept to his wife.
Ichigo-cuz she caused the rain to stop falling in his world (and maybe they both feel for each other in a more than friendly way...they just haven't realised it yet ^^)
Renji-cuz they go waaay back (and perhaps cuz he likes her???)