Elvira Leonardi Bouyeure (1 June 1906 – 24 February 1999), known as Biki, the granddaughter of composer Giacomo Puccini, was a notable Italian fashion designer and couturier of the post-war period based in Milan.
Her clients were mainly connected to the La Scala opera theatre.
Biki is known as the creator of the style for Maria Callas who she first met in 1951 at a dinner party organized by Wally Toscanini.