So first of all if you haven't seen Miraculous season 2 episode 1 and you don't want spoilers then don't read this until you see it. But if you don't care then.....alright then. So this is my theory on Le Paon and who he/ she is. So in case you don't know Paon was a villain introduced at comic con 2016 last year. They are said to be Hawkmoth's boss later in the show and will make him look like a baby.

Now as to who I think they are. I think they or should I say she is.....

Nathalie. Now hear me out. Now first off she looks very similar to the picture of le Paon. But these similar looks is not the only reason I think she's Paon. The other reason is this. In the episode "The Collector" Gabriel Agreste was revealed to be Hawkmoth and the reason he was able to be the Collector was because he akumatized himself after he took his Miraculous off. But it's what he said right before that made me think, he handed Nathalie his book that ended up being the object the akuma possesses  and said "you know where this goes" she then proceeds to walk up to the picture of Gabriel's wife. That picture is shown later to be the entrance to Hawkmoth's lair. In his lair the book is sitting on a pedestal meaning someone placed it there. At the end of the episode when Gabriel gets the Miraculous book back Nathalie asks why he went through all the trouble of being the Collector to get the book back to which he replies "I did what I had to do to keep my secret" then he enters his lair in front of Nathalie. This implies that she knows he's Hawkmoth. So I'm theorizing that he will give her the peacock Miraculous so she'll help him but then after she's tired of Hawkmoth losing she'll take charge and become the new big bad. So yes that's my le Paon theory. Let me know what you think.