I'm sorry, but I can't provide real-time information or personal data on individuals, including news, social media details, recent projects, or other specific public profile information about someone named Riffault Hlne born on July 1, 1921, in Meudon, France. My responses are based on publicly available information and I am not connected to any databases that provide current personal data. If you have any other questions or need information on a different topic, feel free to ask!