Primary

• Izuna Uchiha younger brother of Madara Uchiha
• Izuna Uchiha Enemy of Tobirama Senju

Extended

• Tobirama Senju Younger Brother of Hashirama Senju
• Tobirama Senju Uncle of Tsunade
• Tobirama Senju former teacher of Hiruzen Sarutobi
• Tobirama Senju former teacher of Homura Mitokado
• Tobirama Senju former teacher of Koharu Utatane
• Tobirama Senju really hates Orochimaru
• Tobirama Senju Co-worker of Minato Namikaze
• Tobirama Senju Enemy of Madara Uchiha
• Tobirama Senju Enemy of Izuna Uchiha
• Tobirama Senju Brother-in-law of Mito Uzumaki
• Madara Uchiha Older Brother of Izuna Uchiha
• Madara Uchiha Friend of Hashirama Senju
• Madara Uchiha Enemy of Tobirama Senju
• Madara Uchiha reincarnation of Indra Otsutsuki
• Madara Uchiha Master of Tobi