Princess Louise of Prussia in Baden, and everyone spoke with affectionate pride of their grand duke and duchess in Constance, where the couple had a summer residence. Louise was a great friend of Alice, Grand Duchess of Hesse, her sister-in-law's younger sister; i.e., Alice was the sister of Victoria, Louise's brother Frederick's wife, both sisters being daughters of Queen Victoria. The two often visited each other. In Queen Victoria's letters, she and Frederick were always referred to with pleasure or sympathy as "good Fritz and Louise of Baden". Though friends as young girls, Louise and her sister-in-law Victoria, Princess Royal ("Vicky") always had a
Princess Helena Victoria of Schleswig-Holstein to use the territorial designation "of Schleswig-Holstein-Sonderburg-Augustenburg". Instead, they became known simply as "Her Highness Princess Helena Victoria" and "Her Highness Princess Marie Louise". Although the two had borne German titles, their upbringing and domicile were entirely English. Princess Helena Victoria never married. She followed her mother's example in working for various charitable organizations, most notably the Young Men's Christian Association (YMCA), Young Women's Christian Association (YWCA) and Princess Christian's Nursing Home at Windsor. During World War I, she founded the YWCA Women's Auxiliary Force. As its president, she visited British troops in France and obtained the permission of the