A Dutch policeman and, prior to the war, a distant family acquaintance. During the occupation Corrie initially distrusts him because he works at the jail where Jews and other prisoners are held. However, after he risks his job to give her information about the imprisoned Harry de Vries, she recruits him into her organization. Rolf provides critical information about the movements of the Dutch police and Gestapo, and after Corrie and her family are arrested, he makes sure that the Jews hiding in her house escape safely.