Sejain Bastidas was born in Caracas, Venezuela. She started her ballet training at the age of seven, at the Freddy Reyna Ballet and Music School and finished her training and graduated as a professional ballet dancer at Fundación Gustavo Franklin Ballet Arte School. She has been part of many professional ballet companies, including Ballet Contemporaneo de Caracas (2009), The Metropolitan Ballet in Minneapolis, Minnesota (2010-2011), the Nina Novak Ballet (2011), Ballet Nuevo Mundo de Caracas (2012-2013), and the Compania de Ballet del Teatro Teresa Carreño de Caracas (2013-2016). She has also danced as a soloist dancer with the National Ballet of Ecuador (2016-2017) and The National Ballet of Peru (2017-2022). Sejain participated in the opening gala of the 2019 PanAmerican Games, the World Ballet Competition in Orlando, Florida, and she has been featured in dance history books in her home country of Venezuela. She was involved in a social media campaign with the United Nations about arts and immigration in Latin America and also had a mini-documentary made about her story as an immigrant artist on the Ecuadorian television show “Cara a Cara con Rosalía.”