Agent Provocateur Casper Plunge Underwired Bra In Red. Be the embodiment of 'naughty but nice' in the Casper set. Inspired by traditional 19th-century Broderie Anglais, the deep red Casper bra features sheer tulle that sits like a second skin, accented by Victorian-inspired 'AP' monogramming at the straps and a bow between the cups.