This is the famous ballerina Anna Pavlovna.
From wwd.com/fashion-news/designer-luxury/gallery/looks-from-the-exhibit-on-famed-designer-lucile-lady-duff-gordon-10448992/.
This summer dress is made of sheer fabric. The right half of the bodice continues below the waist band to become the right half of the skirt. The right half is draped up and behind.
Keywords: 1914, Lucy Duff Gordon as designer, Lucy Duff Gordon, Lucile, Lucy Sutherland, Lady Duff Gordon, Anna Pavlovna (ballerina), ribboned hat, earrings, necklace, chemise, vee neckline, bodice ornament, criss-cross blouson, bodice, vee décolletage, long tight sleeves, contrasting cuffs, waist band, Empire waistline, tight skirt, drapery, shoes