"Leaving him in the ninja world is too uncertain,"
Jiraiya agreed on this point.
Orochimaru's disciple, Yakushi Kabuto, had created an uncontrollable creature dubbed "Experiment 626," and who knew what kind of bizarre and extremely dangerous life form an even more deranged Orochimaru could conjure up in the future?
It was better to have him return to Konoha.
Even if he were to conduct secret experiments in the future, they would have to be under the watchful eyes of Konoha, to prevent any uncontrollable incidents.
And there was another thing—
Jiraiya felt that Haruno Sakura had sent him because after all, Orochimaru had once been his comrade; with Konoha's current strength, sending Naruto, Sasuke, or Karin—any of them could capture, or even kill Orochimaru.
This was a consideration for his pride.
"If you can persuade Tsunade, you could also bring her with you," Haruno Sakura said, "I think that way, the chances of persuading him are a little higher."
