In Gatchaman Crowds, when we see Rui outside he/she is wearing a blonde wig of either long hair when looking like a punk rocker or short hair when wearing a blue dress. When Rui is getting dressed to meet Hajime see see his/her chest exposed however there was no sign that he/she was a girl. while there was no nipples shown normally even with flat chested girls there is an attempt to try and hide their breasts and with Rui i think i saw more chest than i was expecting.
All the Gatchamen refer to Rui as a girl however they only have seen him/her in disguise, Hajime makes a comment during their meeting of hiding behind makeup however i don't think i remember her say if Rui is a boy or girl (or correcting anyone)
I'm watching the English Dub and in the credits Shannon Emerick is credited to be the Vorice Actress of Rui, who is the same woman who is credited for being the Voice Actress of "Garden" Engi Threepiece in the Dub of Dream Eater Merry (both i brought from Hanabee Entertainment).
So i am wondering, is Rui just a very flat chested girl or is Rui a cross dressing guy?