Those are lungs on her back.
Yes, there's a big gap in her chest that she uses for speech. In other words, she has a fucked up system.
Yes, it's a she (a very PMS-y she). No surprise there.
And yes, that is my crappy hand-writing. B3
Her attacks mostly consist of her thorns, fists, and her screams of RAAEEGGG. She can make your head pop with all her screaming, I shit you not. -shot-