Kyriakou followed a dual career as pianist and composer. Her recorded legacy includes the complete piano music of Emmanuel Chabrier, whose works she played with idiomatic flair, and recitals of works by John Field, Joseph Haydn, Enrique Granados and Isaac Albéniz. She recorded a major survey of the piano music of Felix Mendelssohn. Her sound, both in recordings and in concert, was characterised by a wide palette of tone colour, as might be expected of a Philipp pupil. Some of the characteristic tone colour of her recordings is due to her use of a Bösendorfer Imperial Concert grand piano for at least some of them, including her Mendelssohn recordings.