Gameru

Gameru is a ninja who possesses one of Iou's prototype ninja tool Dako.

Konoha Histoy Arc
Along with his partner Kusune, they went to Iou to get ninja tools but he refused to give his tools to outsiders. Gameru and Kusune fought Naruto Uzumaki and Neji Hyūga who were no match against Iou's ninja tools. When Iou gave Tenten his latest invention, Jidanda, Tenten easily defeated the two.