Satsuki is a tall slim woman with an angular face similar to her mothers with long dark blue hair and blue eyes. She has rather thick eyebrows and a rather large bust. At the end of the series she cuts her formerly long hair to shoulder length in page boy style.
The following is Kiryuin Satsuki cosplay:
Kill La Kill Kiryuin Satsuki costume comes from http://www.eshopcos.com Details as following: