'Office siren' is a 2024 fashion trend in which young women dress in a sultry corporate style — sheer blouses, pencil skirts, slim-rimmed glasses, blowouts, red lipstick — drawing on 1990s and 2000s office-glamour references like Ally McBeal and The Devil Wears Prada. Popular on TikTok and runways. If your teen is into office siren, she is following a recognised fashion trend. Harmless if dressing for non-work events; potentially inappropriate for actual workplaces depending on dress code.