Her visit also highlighted a school project, aimed at providing students with a safe place to wait for their parents and other transport after school.
Korosaya attended Holy Trinity from Year 1 to Year 8 and was also head girl and dux of the school.
She says returning to the school brought back memories of being a young student preparing to enter high school and begin the next stage of her education.
Korosaya encouraged young girls at the school to believe they are capable of achieving anything they put their minds to.
Insert:Korosaya on young girls. 23rd Sep, 26
She says leadership and change can begin in their homes, communities and classrooms.
Korosaya says this includes taking on leadership roles, being willing to learn and having the confidence to say, “I can do it.”
She says parents, teachers and communities also have an important role in supporting young women to become successful future leaders and citizens.
Korosaya is also encouraging former Holy Trinity students to return for the school's Yellow Note Day this Saturday, give back to the school and reconnect with former classmates.
Meanwhile, Holy Trinity Anglican School Principal Johnson Rura says the school is working to complete a mini pavilion that will accommodate around 500 to 600 students.
Rura says the idea for the facility dates back 34 years and comes from the need for a proper place where students can safely wait for their parents and other transport after school.
He says the project is being funded by the school's Parents and Teachers Association and parents, with assistance from Republic of Fiji Military Forces engineers.
Rura says more funds are needed to complete the project.
He is inviting former students, teachers and supporters of the school to attend its annual fundraising bazaar on October 31 to help raise money for the pavilion.
Rura says Korosaya was invited back to spend time with the students and inspire them, particularly those in Year 8.