Ksenia Nikolaieva was born on 27 March 1991 in Kherson. After graduating from the Kherson Music School (piano class), Nikolaeva graduated from the Tchaikovsky National Music Academy of Ukraine.
She started studying music at the age of 4. Currently, Ksenia is an assistant trainee at the Tchaikovsky National Music Academy of Ukraine, class of Professor Oleksandr Dyachenko. She is a student of the Tchaikovsky National Music Academy of Ukraine, class of Professor Oleksandr Dyachenko.
She made her opera debut at the age of 18 in the role of Marta in Tchaikovsky's Iolanta. Her repertoire includes Olga from Tchaikovsky's Eugene Onegin, Maddalena from Verdi's Rigoletto, Lyubasha from Rimsky-Korsakov's The Tsar's Bride, as well as arias and romances by French, Italian, Russian and German composers.
She studied with the legendary opera divas of the 20th century - Monserrate Caballé and Elena Obraztsova, as well as with the famous mezzo-soprano Anita Rachvelishvili. She is a winner of national and international competitions.