Fidela Oller Angelats was a Spanish religious sister belonging to the Sisters of Saint Joseph of Girona. Born in Bañolas in 1869, she dedicated her life to serving the sick in various hospitals. During the Spanish Civil War, she was killed in Xeresa after being discovered while attempting to live in hiding. Recognized for her steadfastness, she was beatified in 2015 alongside two of her companions. She is remembered as a martyr who died for her religious convictions.