Newt is not unfamiliar with undercover work. To find and save beasts he has to use any resource possible.
Because his pretty features work extremely in his favor, he often uses the diguise as a girl to scout places. Since staying as close to the truth helps to not be caught up in a lie as easily, Newt usually goes by his second name Artemis.
Enter Graves who after getting anonymous tips on a trafficking ring (humans and beasts), stumbles upon Newt in disguise with his aurors and is immediately smitten with her. Newt mistakes him for Grindelwald at first and panicks (Let's say that he just came back from Britain and hasn't met the real Graves yet).
+ Queenie totally helped him dress appropriately. ++ Newt doesn't try to hide who he is from Graves and MACUSA. They are actually impressed by his resourcefulness.
Graves/Newt, Newt undercover as a girl
Because his pretty features work extremely in his favor, he often uses the diguise as a girl to scout places. Since staying as close to the truth helps to not be caught up in a lie as easily, Newt usually goes by his second name Artemis.
Enter Graves who after getting anonymous tips on a trafficking ring (humans and beasts), stumbles upon Newt in disguise with his aurors and is immediately smitten with her. Newt mistakes him for Grindelwald at first and panicks (Let's say that he just came back from Britain and hasn't met the real Graves yet).
+ Queenie totally helped him dress appropriately.
++ Newt doesn't try to hide who he is from Graves and MACUSA. They are actually impressed by his resourcefulness.