Well there r only two possibilities
First: this girl has to be rano, maybe viju don't know anything about rano, rano and viju kahii takra gaye hoonge, first he must have thought its bebo, but then later he founds out that she isn't bebo she is some rano, and now he is using her in place of Bebo. but this time rano is back as a positive person, after hearing what she have to do, and ambo's name she must have quickly agrees to help this viju. but actually she will be helping ambo to get out of this mess.
Second: this girl might not be rano, she must be some one wearing mask the way they showed Kuku uncle was wearing mask.
uffffffffffffff tooooooooo much of confusion, lets see which one comes out to be true.