During the events of Deltarune, Kris is mentioned to be an introvert.[4] Susie and King refer to Kris as a "quiet person," and Noelle is astonished if they converse about "anything."[5] After Kris's brother, Asriel, left for college, they became distant from their few friends.[6] 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.[7] They have a history of not waking up on time, and often slept through the start of class.[8] Kris also preferred their mother driving them to and from school than walking.[9]
Speaks in friendly, brisk bursts with gentle reminders and small jokes
