Born in Orani, Bataan in 1902, Baens-del Rosario was one of the first women lawyers of the Philippines. As an officer at the Department of Labor for decades, she helped draft many labor laws and was instrumental in the enactment of the Women and Child Labor Law. She was a member of various local and international organizations, and for seven years was president of Panitik ng Kababaihan, a civic organization of Filipino women writers. Aside from Erlinda ng Bataan, her works include ten other novels and hundreds of short stories, poems, and essays written in English or Filipino.