Talk about some effective panda herding! Considering the fact that Madoka has no special powers - other than the power to be very adorable, maybe - she's rather impressed by how well Xichen is doing. Madoka first watches from a small distance, clearly impressed, but when she hears the other speak up, she can't help but slowly approach a bit.

(Very carefully though! She doesn't want to startle the pandas away!)

"Um.. talismans, sir? May I ask what those can do?"

Because it sounds interesting! And if it's something that could help them, Madoka is definitely interested.