If the cloud is well, then everything will be fine. . .
If Nangong An was helpless against Da Kong, then she was eaten to death by the cloud attribute (Skylark). She was clearly not afraid when facing XANXUS, but she was pinned down by Hibari Kyouya, a middle-class guy, and couldn't stand up.
After being hit by a rocket launcher 10 years later...
10+ Skylark and 10-Nangong An sat at attention, "Master, could it be that something happened in the past 10 years that caused our debt to you to double again? Why do I still have to stay here to work T_T"
"The word 'men' is redundant, herbivore. You will never be able to pay me back."
"What exactly do I owe you, Hun Dan."
"A lifetime."
Time's up...