Kanae Sumeragi, often referred to as Professor, is a supporting character in this narrative. He serves as the guardian of Iwai, the protagonist, and holds a supervisory position over Houko and Yamane. Kanae is a member of an organization known as Gossip, a group that monitors individuals who possess Killing Goods and are participants in the Murderers Game.

In terms of appearance, Kanae is an adult male with black hair that reaches his neck and brown eyes. His attire consistently includes a lab coat and glasses, which contribute to his professional and analytical image. Information regarding his personality, motivations, character development over the course of the story, and detailed descriptions of any notable abilities he may possess are not available from the provided sources. Regarding his key relationships, the information is limited to his role as a guardian and superior within the Gossip organization and his direct association with Iwai, Houko, and Yamane.