Well we know her costume is pink white and yellow as seen on the poster, but her undershirt if I had to guess will most likely be pink....(but I wish it would be purple :P)
EDIT: Just found a new Nene pic on Pixiv, I personally don't like it that much cuz I would've prefered Sparrowmon banging Nene as opposed to random hairy insert dude, but here it is anyway
EDIT: Just found a new Nene pic on Pixiv, I personally don't like it that much cuz I would've prefered Sparrowmon banging Nene as opposed to random hairy insert dude, but here it is anyway