The Ecuadorian soprano sang operas and zarzuelas from age 10 and had national and international tours with several choirs. In 2009 she began her professional vocal training at FOSJE (Ecuador's Young Symphonic Orchestra Foundation) debuting as a soloist at age 17 in Levy's musical Elisabeth. At the age of 18 she won the second prize at the Jóvenes Talentos International Competition for Classical Music in Cuenca being the youngest contestant in her category. In 2011 she began studying elementary music and dance pedagogy at the Orff Institute in Salzburg. She then studied Bachelor in Singing and Masters in Opera and Music Theater at the Mozarteum University in Salzburg and graduated with honors.

Karina has been a member of the Ensemble for Medieval and Renaissance Music Harmonia Variabilis since 2012 and sings Latin American music in various ensembles.

In 2019 she was crowned World Champion, Best Singer of the Year and Silver Medallist in Acting at the 23rd World Championship of Performing Arts in California against 756 contestants from 48 countries. In the same year Karina received an audience award at the Grandi Voci opera singing competition Schloss Amerang in Germany and was honored by the Salzburg government with the city's silver seal of the city Salzburg for services and achievements in cultural life. In 2021 she won the Grand Prix as well as the Laureate first prize at the Angel Voice Classic International Competition in Serbia and the Laureate first prize at the Aphrodite Voice International Festival in Cyprus.

Karina has been a soloist of the Bad Reichenhaller Philharmonie and the Oper im Berg Festival several times. She has sang the parts of Pamina, Lauretta, Linda di Chamounix, Anne Trulove and Norina in concert performances and has interpreted the main roles of Titania in Britten's A midsummer’s night dream and Susanna in Mozart's Le nozze di Figaro as well as a wide variety of repertoire in 17 languages.