Brendon's unnamed girlfriend (Chloe Holmes) is the hidden villainess of Panic! At The Disco's music video, Say Amen (Saturday Night) (release date March 21, 2018). She was the girlfriend of Brendon Urie, who played the video's main protagonist, who had stolen an ancient artifact known as the "Devil's Key" from a museum, which several masked men broke into Brendon's house to retrieve as he prepared to spend his girlfriend's birthday with her.
After Brendon texted his girlfriend to wait half an hour before coming over, he proceeded to fight off and kill the massive amount of masked intruders. After finishing them off with a stick of dynamite, Brendon heard the doorbell ring and answered it to find his blonde-haired lover waiting for him, with the two immediately getting intimate as they went inside.
But as the two began to undress and prepared to have sex, Brendon's lover turned heel by kicking Brendon in the crotch before shoving him onto a chair, where she proceeded to punch Brendon repeatedly before knocking him out with a baseball bat. After incapacitating Brendon, the evil blonde snatched the Devil's Key from Brendon's neck before fleeing the house as the police could be heard approaching.