Like her mother and the rest of her illustrious total lineage, Princess Marie Louise has magnificent legs - long, shapely, and perfectly unblemished. Though typically hidden away beneath the finest silk stockings, her thighs require as much maintenance as her luxurious long locks of hair, with one maidservant dedicated solely to the task of keeping her legs in perfect condition, not just in the bath, but also with grueling regular exercise.
Yet the true mark of quality is the princess's incredible stamina, able to remain standing for hours at a time regardless of distraction, setting a perfect example for the nation's troops when assembled for inspection. It is rumored that her maidservant's technique is forbidden knowledge from afar, as they train in private, with none to witness how the princess has learned to steel herself against any pain or discomfort and be the perfect model of composure.
Occasional rumors at the palace hint at Marie Louise crying out during these strict training sessions, but the princess is so agreeable following her exhausting training that such rumors are quickly squashed lest anyone question the benefit of the harsh regimen.
Thanks @DefinitelySleeping for the text