Kayden Marx is a male Shinigami who serves as one of the six judges in the Central 46, posessing the designation "Control." He's the greatest army general among Centeral 46, and this causes him to be the one who creates all of the battle plans during the Soul Society Civil War. Kayden Marx is most notable for creating the ability known as Seishin Kei, which includeds mental abilities such as enhanced intelligence, mind reading, telekinesis, telepathy, as well as many, many more.