Another vidcap from one of those awesome viddies 
In a lot of the shots one can see a large patch on the side of one of Tokyo’s butt cheeks.  I’m going to guess that she had had her massive BBL recently in those videos and perhaps that that was the location of her drain.  
I don’t know if that’s her natural eye color, but she has the most amazing eyes to go along with her gorgeous face, giant chest and humongous derrière.