Is Ougi a girl or a boy?

Proper answer: Ougi's sex is undetermined. In Hanamonogatari, Suruga refers to Ougi as 'Ougi-kun', 'he', 'this guy' and 'the boy'. When Suruga asks about it, Ougi tells Suruga that he/she has always been a boy since he/she were born. Later on Ougi states that they has forgotten that he/she is no longer a female. When Suruga remarks on this he/she states that he/she was just murmuring to him/herself.
The music that plays when Ougi is first shown is called まがいものそのものの女. Translated, this means something along the lines of 'The woman who was the fake/sham itself.' This seems to indicate that Ougi is lying/faking something--perhaps his claim to be Meme Oshino's nephew/niece.

My answer: who tf knows

 

Just a badass female

Be confused ya just being badassed.

 

^ that looks like a sis to me

 

She's so cute omg

 

I'll be gay for a day.  /hehe/

 

I think he replied to Kaito's question

If she is a boy and the cover is legit.

Anyway.

She is a beauty

And she is mine, after Vampire donut-girl.

 

She is secretly mine )