In his normal outfit Zen wears a primarily red and blue Supreme Kai uniform, and has light brown hair. He also wears a pair of Red Potara Earrings. In his Class-up state (GM outfit) he gains a white cape, and in his Super Class state (JM outfit) his outfit is altered so that it features a long red robe section and a yellow cloth, his hair also turns red in this state. In his Ultimate Class-up state (UM outfit), his outfit changes to that of a white and yellow design with a red sleeved undershirt and red boots. Additionally, Zen wears a new circlet, and his hair flares up into a more radiant scarlet color while his eyes become yellow.
Zen's name presumably comes from the words "good/goodness" (善; zen).