Kris is a human teenager with an amber skin tone and shoulder-length dark maroon hair with long bangs. 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 their eyes. 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. When deprived of the SOUL for long periods of time, Kris's skin shifts into dark green hue with their movements becoming limp and weak 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. During the events of Deltarune, Kris is mentioned to be an introvert. Susie and King refer to Kris as a "quiet person," and Noelle is astonished if they converse about "anything." After Kris's brother, Asriel, left for college, they became distant from their few friends. Kris's side of their shared bedroom is also strikingly bare. The shared game console is underneath Asriel's bed, and their old children's books are in Toriel 's classroom instead. Toriel has also mentioned that Kris is not normally energetic. They have a history of not waking up on time, and often slept through the start of class. Kris also preferred their mother driving them to and from school than walking. Contrary to Kris's apparent detachment, they do have a variety of interests. As a child, Kris shared Asgore's love of Cowboy's with Tenna and one of Toriel's walpaper's revealing a photograph of them wearing a cowboy hat while bouncing along with Asgore.Kris has always been mischievous, pulling dark pranks such as covering themself in ketchup and claiming it was blood. For example, Kris has the option to keep flushing the toilet before or after going to school, with Toriel replying: "You did not put a bath bomb in the toilet again, did you?" Kris enjoys playing the piano.they frequently played the hospital piano, despite it "missing most of the good keys." They have searched for tutorials to improve, and Red Big Mouth believes they can play the hospital piano "beautifully." Noelle mentions that Kris would often come to her house and use her piano since Kris did not have one in their home.