Prigozhina is the 23-year-old queen of New York real-estate TikTok, a content whisperer to the star agents of Corcoran, Douglas Elliman, and Nest Seekers. In a high-end market that has been slowing since September, with whispers of downturns and 2008 in the air, what Prigozhina offers to real-estate agents is an injection of levity into their malaise and, ideally, thousands of new followers and possible clients. Under her guidance, agents are flocking to TikTok, where, for $700 and up a week, Prigozhina helps them create viral content, writes captions, and even posts on their behalf.