Clara Von Gluckfberg (Poppy Delevingne) was a minor villainess from the 2017 film, Kingsman: The Golden Circle. She is the on-and-off girlfriend of disgraced Kingsman reject Charlie Hesketh, and they are both part of Poppy Adams' Golden Circle organization.
Clara was at a nearby concert in England, where Eggsy and Statesman Whiskey were trailing her to see if she had any connection to Charlie and the Golden Circle. Eggsy is won over by Clara, who took him to her tent with plans to seduce and sleep with him. After honestly revealing his mission to girlfriend Princess Tilde, Eggsy began engaging with Clara, using the ruse to plant a tracking device on her. During the mission, a Golden Circle ring is found on the small of her back, confirming Clara as a villainous conspirator.
Clara later becomes infected with the disease that Poppy had been spreading, and phoned Charlie, who told her to head to Italy. Thanks to the tracking device, the Kingsmen and Statesmen followed the villainess to Italy; finding a warehouse that had Poppy's antidote. Clara recognized Eggsy under his cover name, River, and after their encounter was revealed, Eggsy and Charlie fought, with the former getting away with a vial of the antidote. Clara was last shown apologizing to Charlie regarding her and Eggsy, with Charlie feigning forgiveness before blowing up the warehouse, killing Clara and everyone else inside.