Einir hails from Pen Llŷn and received lessons when she was 9 years old from Alwena Roberts. After a year of study with Meinir Heulyn at the Royal College of Music and Drama, Cardiff, she studied at the School of Music at Bangor University, where she gained her BMus degree in 2005.

She recently completed a Masters in Performance and the Music of Wales at Bangor, where she was a pupil of Elinor Bennett. She also won the ABRSM diploma in performing on the harp.

She has performed recently with the Bangor Chamber Orchestra, Chamber Orchestra of Wales, Ensemble Cymru and to the Prince of Wales. She is a harpist at William Mathias Music Center and William Mathias Schools Service as well.