Id just like to point out this mystery remains even in the hentai world, I have never seen a hentai pic of Quina ever. Ill start searching around for anything that points to either sex.

Yeah the Qu race has no gender at all they are just Qu's . That's why its always used it to refer to them. Unless they have a more genderly figure like quan etc .

Probably, but the point is that its fun speculating...
Personally, I'm holding off my opinion until Blkmage returns from his Hentai hunt...
Ganbarimasuyo, blkmage-san!

Quina is actually both boy and girl. He/she can reproduce asexually. (Note: I have no solid scientific evidence on the matter)

I think Quina is a girl. The reason being is that if I remember correctly, Quina can wear a Lamia's Tiara which is a female only item. That may just be because they want you to think it's an it so that he/she could wear both male and female items, I dunno.

I agree, FF9 is one of the most fantasy-type worlds I've seen(the girl with wings, the boy with a monkey tail, the mage w/o a physical body, the rat Queen Brahne whose race i cannot tell and even Amarant. Come to think of it this is the game w/ the most races). It's possible for Quina's occurance.

I feel Quina is neither a male nor a female. I think Quina is a s(him). It is too hard to tell what gender this character is. So I have not a clue, but a s(him) is my guess lol.

I prefer to think of Quina as female but i dont think it realy has a gender

I think assigning Quina a gender kind of ruins the character. Quina is probably the most bizaar character in a Final Fantasy and making the character genderless only helps that, in a good way.

So I like to think of Quina as being genderless.