I got confused too, but the tall woman, Olivia, isn't the one being changed. Her short rival Penny that you meet in Week 2 is. I assume because her old design was just a bit too childish.
Oh? I wasn't aware. Haven't played it in a while and back then Chapter 2 wasn't there yet...this makes me curious though. What was that gals original design? Devs, can you give a side to side with the original design?
Also, thanks centlaure for explaining it to me. =3