Nawaki

was the younger brother of Tsunade and the grandson of the First Hokage. He was very much like Naruto Uzumaki in both appearance and personality and like Naruto, Nawaki also had the dream of becoming Hokage one day.

After hearing of this dream on the day of Nawaki's twelfth birthday, Tsunade gave her brother the necklace of their grandfather the First Hokage as a present, proud of the determination her brother was showing. Years later, she would give the same necklace to Naruto, making the parallel between Nawaki and Naruto even stronger. The day after his birthday, Nawaki died in battle. His body being so heavily mutilated that it was beyond recognition.

Orochimaru would later offer Tsunade to bring Nawaki back to life, together with Tsunade's lover Dan, in exchange for healing his arms. The resurrection would require a human sacrifice, though. She ultimately refuses, realizing that Nawaki and Dan would not want her to sacrifice the lives of others in exchange for theirs