Petra Orbanić was born in 1991 in Pula, where she graduated at School of Applied Arts and Design high school. She enrolled Academy of Fine Arts in Zagreb, studies of painting in 2010. She spent one part of school year 2013/2014 at Academy of Fine Arts in Helsinki, within Erasmus program. She graduated at the department for Art education at Academy of Fine Arts in Zagreb in 2016. In 2017. she started MA studies in graphic department at  Academy of Fine Arts in Zagreb. She graduated at the graphic department in 2018.

In collaboration with artist Marija Plečko, Petra organizes, participates and collaborates on many art workshops and projects. From September 2014 Marija Plečko and Petra Orbanić have started artistic collaboration that has originated from their shared process of walking, hiking and climbing, which have become inseparable part of their creative process.