Fan Casting The Devil wears a well known shoe brand that shall not be named

So this is based on how I used to think Devil Wears Prada was about a female version of the Devil who's a society girl... anyway the Plot is something like this: Damian Bagerly is an average man who works at a high end retailer, constantly dealing with entitled Karen's, while having an admiration and desire to find his own 'uptown girl', He finds it in Lucy Fern, a charming, wealthy, yet charismatic and caring young woman... Of course, Lucy has a secret... She's the Devil