This pairing could work several ways. Twilight and Shadow both started as being antisocial but eventually warmed up and accepted new friends. Plus you have that little bit of symbolism " light and shadow".
5 points, to be honest it is as if you read my mind because it really is all that I have ... but I do not want to have premium account .. just have fun with these beautiful works of art that you and others do. .. very good 5 point for the image