Yan Fei first battled the Lightning Controller at the Vatican Holy See. At that time, Yan Fei's physical body was trapped inside the Vatican Museum, and the Drone rushed to the rescue. However, it attracted the Lightning Controller's attention, leading to a fierce battle with the Drone in the skies above the Holy See.
The Lightning Controller was terrifying. Not only could she fly upon lightning, but she could also conjure lightning out of thin air to attack Yan Fei's Drone Avatar, at one point shocking Yan Fei so severely that he questioned his life choices. Had Yan Fei not come up with a quick-witted strategy to use a barrage of missiles to attack significant buildings in the Holy See, diverting the Lightning Controller's attention, his mission might have been jeopardized.