Translated this.

What does "fufu" mean?

I think it's just a giggle.

Yep. "fufu" is a haughty sort of way women giggle.

It would actually make more sense as "huhu" since Japanese doesn't make a distinction between the "f" and "h" sounds.

It works either way, but since the common romanization of ふ is "fu", and since it's spoken with the lips almost closed, "fu fu" it is.

Wow this is awesome.
Don't know which one I'd rather be, maybe the top one, but I'd love to be any of these.

I wish she'd tease me, these "Messiah Cage" pics are sweet!