Speaking of which, Lu Bei had never met Fox Er in person. During their only encounter, when Fox Er showed maternal affection, she was hiding under the guise of Lin Buyan, warning her godson that the Kalpa Passing Stage was deep and unpredictable.
The reason he could guess that the secret letter was sent by his godmother was because he had smelled a similar fragrance on the five little foxes.
It's a unique pheromone unlike anything from rouge or face powder, mildly enchanting and intriguingly elusive. If a male were to smell it, his spirits would be refreshed; if a female were to get a whiff, her heart would flutter. Each fox spirit has a different blend, a personal mark, so to speak.
Under normal circumstances, this scent is tightly concealed and not constantly released.
Otherwise, the fate of other fox spirits might be unpredictable, but those five on Three Pure Peaks would be driven away by Elder She.
