Now this is an interesting pair.
People who are familiar with the anime and manga Yu-Gi-Oh! will know that Kaiba's rival, Yugi, is the one who uses Magician and Spellcaster based cards.
So what's the Magician's Valkyria doing with Kaiba Seto in this photo?
I first thought the cosplayer on the left is Dark Magician Girl, but her staff is different, and so is her skirt. Good thing a friend of mine got to correct me before I actually posted this.
Anyway, awesome cosplay! This image is cropped and you can view the original here.