Under the current circumstances, AD would certainly seem to be a saviour of Bani under certain circumstances. True AD may be using Bani for some nefarious motives on his own, it is quite certain that Bani would have been left to rot on her own in MA, probably even be killed by the three witches. But that does mean AD is God's angel. Not necessarily.
Consider the possibility that AD may be the Mr. X, the mysterious guy who has been presecuting the Walias.
The man who tried to assassinate JW after PR raaz.
The man who tried to assassinate JW after divorce, which resulted in death of the baby.
The man who masterminded the ONS scam, the edited CD.
The man behind Sahil's death/disappearance.
The man whose hidden hand resulted in Bani being convicted in the first place.
Face, it even if you put Sahil, Pia and Jigs put together they dont have the brains and ability to put together a decent conspiracy.Karuna of course is a diff ball game but this seems to be beyond her too. So that leaves an unknown person. Could be Nattu-Barnali duo or TS or could be an unknown, unseen, (Aparichit, andekha, anjana)person - AD.
I would certainly be hesitant to describe AD as an angel yet. May end up with a lot of egg on my face.
Rgds,
Pri