Akamaru (赤丸, Akamaru) is a nin-dog (忍犬, ninken) from Konohagakure's Inuzuka clan. He is Kiba Inuzuka's partner, as well as his best friend and companion. He is also a member of Team Kurenai.
Background
At some point, while Kiba was still in the Academy, his mother, Tsume Inuzuka, entrusted him with Akamaru. Although Akamaru almost immediately urinated on Kiba's face, much to his mother and sister's amusement, [Age 5] the two would soon become inseparable.
New Era
Thirteen years later,[Age 16] having grown old, Akamaru became very docile and laid about with his new pups. He would mock Kiba's insistence he had turned down the Seventh Hokage seat, however, smirking playfully at his master.