Nezumi is a character in the Yu-Gi-Oh! manga. He is a boy with buckteeth, who uses a sob story about him getting hit by yo-yos in a robbery to lure Yugi Mutou and Katsuya Jonouchi to Hirutani.
Nezumi told Jonouchi that three gang members ambushed him, beat him, and stole his yo-yo. Out of anger, Jonouchi asked Nezumi to lead him to the gangsters. Yugi and Jonouchi traveled to Hirutani's torture chamber, where a group of gang members ambushed the two of them. Nezumi ran away when Jonouchi and Dark Yugi managed to defeat the gang members.