Orlando “Orly” Castillo [b. 1947] studied fine arts at the University of Santo Tomas (UST) in 1965, where he began as an abstract painter; he later shifted to graphic arts. It was when he shifted to graphic arts that he was recognized, with him being the Benavides Awardee of UST in 1970 and 1971 and receiving several Shell National Students Art Competition awards for the following: third prize for on-the-spot painting, first prize in graphic arts in 1970 and 1971, and also a runner-up in graphic arts in 1971.

Castillo was arrested in 1973 for subversion and held in Camp Crame for six months. During this time, he organized sketching sessions and sold paintings and other souvenir items to Sunday visitors along with other artists. He became the president of the Philippine Association of Printmakers (1973–1975) and also served as the president of the Art Association of the Philippines (1983–1984). He was also a founding member of Kaisahan (Solidarity), an organization of social realist artists, with Papo de Asis, Pablo Baens Santos, Jose Cuaresma, Neil Doloricon, Edgar Talusan Fernandez, Charles Funk, Renato Habulan, Albert Jimenez, Al Manrique, Jose Tence Ruiz, and Vin Toledo.