The formidable swordsmanship of the Ace of Hearts belies a curious childhood spent in the Magic Tower. Within the Red Army which stresses rank, he toiled with painstaking effort to earn his. To those around him, his very existence is an anomaly.

Zero possesses deep blue eyes with a hint of , light blue and untamed ash brown hair accompanied by a distinctive blonde streak over his right eye. His skin tone is relatively tanned with a grey-ish hue.

He takes his role of Ace very seriously.