We Finally Know Who Is Behind Each of the Clown Masks on American Horror Story: Cult

In episode four, Beverly is recruited as part of the cult following her being passed over for a promotion at work (which Serena Belinda receives instead, until she is brutally butchered while filming a segment . . . which Beverly is not really that broken up over). By the time the clowns are terrorizing Ivy, Beverly is totally part of the crew. The reason she has to be Satanist clown is because Satanist clown doesn't have any skin showing. If you could see her brown skin, it would be a dead giveaway that it is Beverly. Clever, clever, Ryan Murphy.

Later, it was confirmed this clown was Beverly in a preview for the fifth episode!