Nine-Tails' Power made Jiraiya fully aware of the Nine-Tails' potential.
Naruto with four tails.
He had already become too much for Jiraiya in his normal state to handle.
That meant...
If Naruko worked a little harder,
she could use her own consciousness to control the state of having four tails.
After growing a little older and controlling five tails, she would be able to directly match herself in Sage mode.
No, she might even surpass him.
In the face of the Tailed Beast's Power, human techniques seemed so terribly pale.
Jiraiya had no idea what Naruko had been through.
But being able to control three tails at the age of seven
could not be separated from Hyuga Sho.
Hyuga Sho had said that he had never personally taught Naruko.
Everything was due to external factors and Naruko's own efforts.
He had merely made some casual arrangements,
yet Naruko had achieved such results.
If he had taught her personally...
Jiraiya could figure out with his toes how high Naruko's achievements would have been.
However...
Jiraiya stared at Naruko, who had fallen unconscious.
There were burn marks on her skin.
These wounds... made it seem as if Naruko had been scalded by flames.
"the Nine-Tails' Chakra..."
Jiraiya's expression was grave.
"Has a corrosive effect."
Hyuga Sho picked up the thread.
"The reason is that Naruko isn't a 'Perfect Jinchuriki'..."
This point
could be learned from Yagura.
From the earlier conversation between Killer B and A, one could also gain a rough understanding of it.
"I see..."
Jiraiya was astonished.
Hyuga Sho even knew about this.
He was actually so familiar with matters concerning Jinchuriki.
"It's nothing..."
Hyuga Sho shook his head.
A lot of people knew these things.
Only Konoha was unaware of them.
This was related to Konoha's Tailed Beast management