Kris is a human with an amber skin tone and messy, shoulder-length dark maroon hair. They wear a long-sleeve lime shirt with one horizontal yellow stripe, and nondescript pants and shoes. One of Kris's distinct traits is that their long bangs cast a shadow that hides the upper half of their face. In the brief moments they tear the SOUL out of their body, their red eyes can glow in the dark. One of their crimson eyes is also visible for a few frames when they descend into a Dark World.
In a Dark World, Kris's entire appearance transforms, making them resemble a knight. Kris dons silver armor: shoulder pauldrons, a cuirass, gauntlets, and boots. They wear a navy blue bodysuit underneath the set, and a pink cape drapes across their right shoulder. Finally, Kris's skin changes to cyan, and their hair transits to navy. The shading for their skin is also used for their cape, giving the illusion of blue stripes in a few of their sprites.
To the player, Kris consistently has a blank, neutral expression. They seemingly stand straight during the majority of non-scripted actions. Kris' expressions and movement are different when they are about to remove or have removed the SOUL.