Tezni was born in Neath Port Talbot in 2003. She is fifteen years old and is currently attending Ysgol Gyfun Ystalyfera.
Tezni plays a number of instruments including the piano, harp and guitar and has recently started learning the saxophone. She is a piano pupil with Mark Ritzmann and is currently working at Grade 7 piano, having gained a distinction in her Grade 6 exam, for which she was invited to perform at the High Scorers Concert in All Saints, Oystermouth. She is also working towards Grade 7 Harp having gained a merit in her Grade 5 exam. Tezni also plays rugby for Seven Sisters RFC and enjoys attending dance classes and composing her own songs.
In September 2017 she began training as assistant accompanist with Neath Polyphonic Choir, and subsequently took part in two concerts. She takes over as the Choir’s main accompanist in September 2018.