Nawaki Senju

The Boy with Courage becoming Hokage and he was a brother of Tsunade and a Genin Shinob

Past
Nawaki died with explosion in the forests and Tsunade was sad about he loss of the little brother.

Legend of Yuki
Nawaki was 16 Year old boy at the year of 195 A.D. and around 199 A.D. He was ressurected by Bricker the Super Shinobi after Okami Yuki's Exploits

Years have Passed
Nawaki was reborn and kept alive with courage on being a Hokage with Bricker as his Parent.