DJ K is a character from the anime Sakugan, serving as a popular radio personality within the world of the story. His role is that of a radio host who broadcasts a program heard by the protagonists, Memenpu and Gagumber, as well as other inhabitants of the colonies. He is a key figure because radio is presented as a precious source of information in this underground, labyrinthine world. His program is called Good morning K.

DJ K's role in the narrative is somewhat mysterious, as he exists primarily as a voice on the airwaves. His connection to the main plot is ambiguous, with his influence being more atmospheric and informational than directly participatory. He is described as a character who broadcasts continuously day and night, providing a constant presence in the background of the characters' lives. The character segments were written by Masaru Suwa, an actual radio host and writer, who aimed to create the impression of a radio DJ that feels authentic yet doesn't quite exist. The direction for the performance was to be like a fake FM DJ, with an over-exaggerated impression of a radio host. This suggests a personality that is larger than life, engaging, and somewhat artificial, serving as an entertaining and informative guide to the world.

He has no significant direct relationships with the main cast, as he never physically interacts with them in a typical sense. Instead, his relationship is with his listening audience, which includes the protagonists. He acts as an unseen companion and narrator of the world for them. Regarding development, DJ K remains a consistent presence throughout the story as a broadcaster, without undergoing a personal character arc. His notable ability is his role as an informant; his broadcasts deliver the latest news from various colonies, making him a valuable and trusted source of information for the people living in this dangerous and divided world.