Not true, I don't know if the 2nd season is published in your countries but in France it is and Nadja Chamak isn't become that person.
(I hope it's understandable, I'm french... Sorry for my bad english and please correct my mistakes >w< )
Yeah you're right Nadia isn't that villain and no your English is good.
Yes indeed I have already seen the 3 episodes of season 2 and that is not the right villain