"Monkey! You..."
Tobirama Senju, with his silver hair and blue armor, looked at Hiruzen Sarutobi with an expression of disbelief. At this moment, his memory drifted back to the time when Konoha was first founded.
Back then, the area of Konoha was not yet this prosperous, nor were there this many ninja clans. It consisted primarily of the Senju Clan and the Uchiha Clan.
As the two mortal enemy clans shook hands in peace and established the first ninja village, the landscape of the entire Warring States period began to shift. For individual clans and surnames to continue surviving in this ninja world grew increasingly difficult, so the major ninja clans began gathering toward greater powers, and the Sarutobi Clan entered Konoha during this very period.
Compared to ordinary ninja, the Sarutobi Clan naturally possessed great advantages, but when compared to bloodline and secret jutsu families like the Aburame, Kurama, and Hyuga, they were not much to speak of. Still, the Sarutobi Clan could be considered the first named ninja clan to join Konoha.
Thus, Hashirama Senju and Tobirama Senju jointly took in the then-young Hiruzen Sarutobi as a disciple.
Although Hiruzen Sarutobi's teachers were the Senju brothers, the only one who truly taught Hiruzen Sarutobi was Tobirama Senju.
If you attended one of Hashirama Senju's lectures, you would never go to a second one.
After all, that guy Hashirama Senju was simply a non-human existence. To call him a cheat-user was to flatter cheat-users; Hashirama Senju was what you called an admin-mode abuser.
Did ninjutsu require hand seals? Wasn't it a matter of slamming your hands together and whatever you shouted just appeared!
Therefore, the one who truly taught Hiruzen Sarutobi was Tobirama Senju. It could be said that Hiruzen Sarutobi was the prized disciple he brought up hand