Guillaume Piens

Based on the provided articles, there are two individuals: Guillaume Piens and Guillaume Paul. Guillaume Piens is the General Commissioner of the Art Paris art fair. He was featured on BFM Business's 'Tout pour Investir' program on April 1st, discussing the return of Art Paris. Guillaume Paul is a host on BFM Business, specifically for the program 'Tout pour Investir.' On April 1st, he hosted multiple segments of the show, including discussions on Eurodollar investments, navigating market volatility, and the banking sector's performance. He also presented the 'tableau de bord' segment. The articles highlight their respective roles and recent appearances on BFM Business, showcasing their involvement in the art world and financial news reporting.