Born in London of Greek-Cypriot heritage, Louisa Petais attended Trinity College of Music where she graduated with a BMus (Hons) degree in 2007. In the same year Louisa was accepted onto the L.T.L (Laboratorio Toscano per la Lirica) Opera Studio programme in Italy and performed as a soloist in their production of Paride ed Elena by Gluck at Teatro Verdi (Pisa) and at the Opéra Royal de Wallonie, (Liège, Belgium).

Louisa has performed in operas, oratorios and concerts throughout the UK, Europe and the USA.

Operatic engagements have included the role of Emone (Antigona - Traetta) at the International Festival of Greek Theatre in Cyprus, the role of Carmen (Bizet) for St Albans Chamber Opera, Melpomene (Il Parnaso Confuso – Gluck) for Les Bougies Baroque, Lady Macbeth ( Macbeth -Verdi) for Opera at Bearwood, The Mother in the premiere of Sebastiano Dessanay's opera The Cry of the Double Bass at the Tête à Tête Opera Festival and most recently the role of Santuzza (Cavalleria Rusticana - Mascagni).

Louisa is a highly-experienced voice and piano teacher and has been teaching with MIO for over ten years. In addition to private lessons she is also experienced in leading group workshops and coaching choirs.

During the 2020 Covid lockdown Louisa began writing poetry and lyrics which sowed the seeds for composing her own alt-classical musical, Dopamine Fairytale, which will be debuted in 2025