Beatrice is a lot more attractive and seemingly much healthier than another character within the story. Her demeanor also gives the feeling of moral goodness—she brightens the shadows, which metaphorically evokes goodness casting out evil. Beatrice's undoing at the end of the story is precipitated by her loss of innocence; https://deankkjhf.blogzet.com/rappaccini-s-daughter-summary-in-urdu-no-further-a-mystery-36893464