Jinnai is an Iga dog and can be distinguished from the others due to the dark and thicker line below his eyes. He goes to the pond with Akame, Kirikaze and Gin to get medicine for the Ou pack, especially Ben. The Kogas show up and Akame orders them to leave. Jinnai tells Kirikaze he must obey the master's commands no matter what. He is later killed hile perfoming an attack to bring Madara down. Jinnai leaps into Madara's jaws which crushes him.