Oh for sure! It would not be fun if they got along all the time. ^.^

Their own world yes, and only equal if they choose to be. They can make powers strong in the world too. It would be as limited as the imagination makes it.

Yes, I really liked the idea of darkness manipulation and I see where you are going with the Yin and Yang. We could do a lot with that actually! The first idea that came to mind is when they use their powers the first time, a mark appears on their arms. A yin for Adam and a Yang for Ciara. How would her light work though? I know that with darkness he could form objects, slip through shadows, enter a world of darkness, be able to see in pitch black, darkness energy blast, ect. Im curious about how you see light working for her. And how would this be combined with the pocket world?