"Yeah, I know," she said, aiming her gun at his head.
"No, no, please, let me live and I'll work for you," the man begged, trembling.
"No, thank you," she replied, pulling the trigger.
"NO!"
A few seconds later, the door opened, and the girl came out alone.
"How many are left on the 'must kill' list?" she asked the other girl as she removed her mask.
"We've finished off all the low-level members, but there are still some hard-to-find personnel left in the "must kill" list, so it's taking a bit longer."
The girl with the mask is Feng Xue, one of the Feng sisters and a Shadow Guard under Su Lian's control. She is the oldest, so when Su Lian isn't there, Feng Xue takes over. She's the best at assassination and interrogation.
The other girl is Feng Mei, the fourth sister and a master of disguise. She can come and go from any place as she pleases.