Gameru

is a ninja who possesses one of Iō's prototype ninja tools, Dakō.

Abilities
Not much is known about Gameru's abilities other than that he showed some skill in close combat with the use of Dakō and was capable of fighting against Naruto Uzumaki and Neji Hyūga, who are known for being rather skilled in close combat themselves.

Konoha Histoy Arc
Along with his partner, Kusune, they went to Iō 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 Iō's ninja tools. When Iō lent Tenten his latest invention, Jidanda, Tenten easily defeated them.