A master assassin given new life as a heroic spirit, Tsubaki specializes in espionage and combat medicine. She can quickly apply treatments that ease fatigue or let one drain a foe's life. With powerful chakra and a host of self-made drugs, she is an excellent - if dangerous - ally.
Tsubaki is based on Mochizuki Chiyome, a feudal Japanese noblewoman of the 16th century who created an underground network of kunoichi in service of the Takeda clan. She recruited prostitutes and other wayward women, victims of the civil wars of the Sengoku period, and young girls who were either orphaned, lost or abandoned. Many people believed that she was helping these women and giving them an opportunity to start up a new life, but in reality they were trained to become information gatherers and verifiers, seductresses, messengers and, when necessary, assassins.