Amazon has a ton of those cheap short puff sleeve dresses that look whimsical, pair it with a cheap pair of wings from a halloween store and your good to go, like this https://www.amazon.com/gp/aw/d/B0B468LHV7/ref=sspa_mw_detail_6?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWw Or this https://www.amazon.com/gp/aw/d/B07YFSL2TZ/ref=sspa_mw_detail_3?ie=UTF8&psc=1&smid=A19FFR8R0QPQHY&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWw