After finding out about the death threats in her best friend's life, her husband transfers Diana to the Department of Surgery so that she could look after J.
Diana doesn't mind being transferred to a department where there are a lot of chances for her to encounter her opposite sex as long as she could help in keeping her best friend safe.
She has been thinking about J's words last time and maybe she was right. She needed to face her fear because maybe, she'll end up not scared of it anymore.
Diana has already started her shift in the Department of Surgery and she has been having a hard time adjusting. She is used to her routine and now suddenly her routine has to change. But thankfully, J has been with her throughout.
J has been helping her get familiar with the instruments, procedures, and machines inside the operating room.