A seventeen-year-old slime handler serving as a guide for the Labyrinth Post Office. With broken polite speech and a loud voice, he calls the one he walks with aibou-san, and leads the way with the long sleeves of his bureau uniform still folded back. He cannot read maps, but remembers paths by smell and the feel of walls. In the bucket basket on his back is a blue slime inherited from his grandmother; when it is called feed or a tool, his voice rises a notch. When praised, he pulls his cap down over his eyes. His mornings start with changing the slime's water, and half his pay goes to his grandmother in the post town.