I think that's just because of her classic topless winpose.I-no's design is fantastic. Of course, there are people bitching that she's "wearing a bra" (looks more like a collared leather halter). There's other places to get your anime tits, boys.
I doubt she'd have it now.
And if you know anything about this char, it's that she's very suggestive and horny lol. There's very few game chars that are more sexual than I-no.