Shizune (シズネ, Shizune) is a Jōnin of Konoha and the niece of Dan Katō. An apprentice of the legendary Sannin Tsunade, Shizune is a talented medical-nin and an assistant to the Hokage. Seeing Sakura's improvement, and her Master renewed pursuit of excellency, Shizune decided that she also needed to grow. Unable to completely incorporate Tsunade's style to hers, Shizune found her own path: master of potions and poison.