Since Emmanuel Macron’s election to office this past spring, Brigitte Macron has been shaking up the role of France’s First Lady in more ways than one. Aside from being 24 years her husband’s senior, at 64, Macron’s favorite unconventional fashion choices feature hemlines that fall well above the knee—and place her gamine, toned, and tan limbs squarely in the spotlight. Directly after inauguration day, Macron celebrated mid-May’s sunny days at the Élysée Palace in a cornflower blue Louis Vuitton skirt suit that inched upward to reveal the head-turning limbs that would soon become her signature. A belted black shift, also...