Dan Katō

Dan Katō (加藤ダン, Katō Dan) was a renowned jōnin-level shinobi from Konohagakure.

Personality
Dan was a great man that deeply loved his village and its inhabitants. He also cared deeply for his sister and would often pick her up from the Academy; something he would later do with his niece as well. He is also described as a wise and honourable man that truly believed in justice.

History
After the death of his younger sister, he began advocating for medical ninja to be assigned to every ninja squad. Tsunade shared a similar belief, and the two soon began dating because of it. During their time together Dan shared with Tsunade his dream of becoming Hokage — wanting the title so that he could better protect the villagers of Konoha. Tsunade gave Dan her grandfather's necklace as good luck and encouragement to follow that dream. Soon after that, however, Dan was fatally wounded during the Second Shinobi World War, and, despite Tsunade's attempts to save him, succumbed to his injuries. sunade would later take on Dan's niece, Shizune, as an apprentice and some time later, leave the village.

Love Interests
Tsunade