Leilani gained a Masters of Performance from the Royal College of Music, graduating with a Distinction. She also holds a First Class Honours in Music from Royal Holloway College University of London, where she was a choral scholar in the esteemed chapel choir for three years. She has sung with Opera Holland Park Chorus, the Philharmonia Chorus and Opera Rara, and has performed the roles of Nora in Riders to the Sea (Midsummer Opera), Dorabella in Così fan tutte (Celebrate Voice), Hänsel in Hänsel und Gretel, Countess Ceprano and il Paggio in Rigoletto, Annina in La Traviata and Cherubino in Le nozze di Figaro (Diva Opera). A keen recitalist, she won First Prize in the Courtney Kenny English Song Competition in 2016 and was a Leeds Lieder Young Artist in 2019. She also enjoys singing programmes of jazz and cabaret music.