The doctor and the examination on the beach at night
I think it's a cool scene that kind of steals the show.
In the middle of all that extreme masochistic training mess, time stops for a second and she shows up to examine the soldiers/candidates.
Surreal in a way as some kind of "angel in white", an aristocratic-like highly capable and professional medical expert among the rookies and idiots.
Her character is minor, but very well written one IMHO.