Famous for running the Karina & Marina YouTube channel where she stars as herself, Karina, and as her imaginary twin sister Marina. She has garnered massive popularity there for her gymnastics, toy reviews, and challenges where she often has Karina and Marina compete.
She began doing gymnastics at the age of five. Her YouTube channel was created in March 2017.
She has seen her YouTube channel grow to boast more than 3.3 million subscribers. She has also garnered more than 400,000 followers to her Instagram account. In 2019, she published her first book titled Karina & Marina: Idénticas y Opuestas.
She first introduced Marina to her viewers in November 2017. Her mother Myla is from Bulgaria and they have a YouTube channel together called KymStyle. Her father is Spanish and his name is José.