Tono Katasuke

Serving as a specialized jōnin within Konoha's Scientific Ninja Weapons Team, this brilliant inventor dedicated his life to rehabilitating war casualties through advanced prosthetics. While frequently seeking approval from the Seventh Hokage, he formed deep bonds with Naruto’s family, even acting as a mentor to Boruto. His groundbreaking technology successfully restored limbs to patients like Ao and the ninken Chamaru, leading Akita Inuzuka to join his laboratory as his loyal assistant.