Holder of a Master’s degree in musicology from the Sorbonne University, a First Prize from the CNSMDP and several awards in international competitions, Delphine Haidan He then enrolled at the École d’art lyrique.

Since then, she has enjoyed a distinguished career on major French and international stages. She has appeared in productions including The Tales of Hoffmann (La Muse/Nicklausse) at the Opéra Bastille and the Zurich Opera House, from The Damnation of Faust (Marguerite) in Moscow and Kyiv, as well as The Child and the Spells at La Scala in Milan and in Seattle. She also plays Geneviève in Pelléas and Mélisande in Tokyo.

His extensive discography includes, amongst others, Lakmé featuring Natalie Dessay and Michel Plasson (Erato), Harmonious Dissonances by Éric Montalbetti (Alpha, 2020), Symphony for Life: an album for carers (Warner) and, more recently, Two mezzos or nothing (Klarthe), recorded with Karine Deshayes and awarded a ‘Choc de’ by Classica.

In the summer of 2021, she was invited to the Berlioz Festival to play the role of Anna in The Trojans in Carthage with the Les Siècles orchestra, conducted by François-Xavier Roth. That same year, her portrayal of Filipievna in Eugene Onegin, at the Théâtre des Champs-Élysées, directed by Stéphane Braunschweig, has been unanimously acclaimed.

In 2022, the concert series Two Sisters, performed at the Philharmonie de Paris and the Opéra d’Avignon alongside Karine Deshayes with the Orchestre national Avignon-Provence conducted by Debora Waldman, was a resounding success. Critics have praised her as a mezzo-soprano who is «highly refined, with a warm timbre and great sensitivity in her musical expression, thanks to a very elegant legato» (Moisés Ordóñez Alarcón, Olyrix). She also performs Alexander Nevsky He performs Prokofiev at Les Invalides, sings Brahms at the Salle Gaveau and gives numerous recitals, notably at the Lisztomanias and Notes d’automne festivals.