Three of IS_MIRRI21’s partners, Institut Pasteur (France), University of Torino (Italy) and Institut National de la Recherche Agronomique (France), presented three microbe enthusiasts who are biologists currently active in their field, for the World Microbiome Day Stories. The aim of this exciting initiative for IS_MIRRI21 was to showcase how microorganisms are the supporters of human lives and that it is easy to fall in love with their complexity and power if we learn more about them. These three biologists from IS_MIRRI21 expressed their interest and love for microorganisms so that all microbe fans around the world can understand why many scientists choose to study and preserve microbes with care and security. #MicrobiomeAmbassador is an online campaign initiated by the EU project MicrobiomeSupport to use social media to connect all microbe lovers so that they can share why they love microbes and their communities. To read about how Mery, Perrine and Ilario interact with microbes every day, please visit the World Microbiome Day website.