The orange one

"What does the orange one do?" You ask and Kruya takes the small bottle out of the case. "It represents the rat's carcass in the way that it changes your body into any person's body you wish. Technically you have to take a blood sample and mix it with the solution. You'll keep your pretty face, but get someone's body to play around with."

The way she said 'play around with' made you very red and your mind wanders.