Board Thread:Theories and Speculation/@comment-25319479-20180502154141/@comment-35480222-20180503205149

RexGodwin wrote: Indeed he even has white hair in the manga like KK

Nice. the age fits, he is younger than Jiraya and older than Kakashi. He could be also Konohamaru's father, Asuma's older brother and Hiruzen first son. About the giant toad maybe he could have forced him to sign a contract (after shippuden) and burned up his body, that's why his body has been rebuilt