Yin and Yang

I used Photoshop to color the pic. The coloring is my OC's Naoko Nozomi (girl) and Katsu Ashihara. Please don't steal my characters or draw them better then me. I'll be very sad.
They look like Yin and Yang to me. Though I think the black one (yang?) is the femini piece...but I'm not sure

Thank you Takamura Maya who originally drew this Blind Justice.

Edit: I'm thinking of redoing this image. I don't particularly like how I colored it and feel I couldv'e done more.