I'm Rias Gremory. Though i'm a girl i'm the king of my clan known as the "Gremories". I control red and black lightning to fight our opponents killing them if they're too weak. My power if you piss me off is surprisingly high. Higher than anything you've seen before.. My potential is unlimited but I don't actually try to use that potential, you, my bishop Asia, My pawn Issei, my knight Kiba, my other bishop Koneko and my Queen Akeno fight with me. Gasper is another pawn with limitless potential.