Mathilde Aubat-Andrieu is a harpist and cofounder of the association Les Signes de l'arc (The Signs of the Arch). She was awarded a gold medal and first prize in proficiency at the Music Conservatory in Troyes (France) and gives regular performances at reading-concerts, with chamber music ensembles and orchestra.

Laurence Bancaud is a harpist and cofounder of the association Les Signes de l'arc. She was awarded first prize at the CNSMD (Conservatoire National Supérieur de Musique et de Danse) and has a master's degree in musicology and specializes in contemporary music. She is author of Tôn-Thât Tiêt: Dialogue Avec la Nature.

Aurélie Barbé is a harpist, composer, and cofounder of the association Les Signes de l'arc. She was awarded a gold medal at the Music Conservatory in Caen (France) and a higher studies diploma in musicology. She is a teacher and performer, specializing in modal, minimalist and improvised music for both classical and electric harp.

Hélène Breschand is a harpist, composer, and cofounder of the association Les Signes de l'arc. She was awarded a gold medal and first prize in proficiency at the Conservatoire à Rayonnement Regional in Paris. She pursues her career as a soloist in the contemporary repertoire and in new creations, improvisation, and musical theatre.

Lilian Rossi has pursued an academic career and is the author of Doctors and Nurses. Jean Rossi is an administrative officer. Working as a team, they have translated numerous academic and literary works from French and German.