When Menma floated out from Naruto's body as a spiritual form, aside from being surprised, everyone finally believed Naruto's words.
Sasuke frowned: "This is?"
Naruto scratched his head, not knowing how to explain to everyone for a moment.
Menma took the initiative to speak: "I am Naruto's Heart Demon, Uzumaki Menma! I warn you not to bully Naruto, or I won't be polite to you!"
"Tch!"
Sasuke curled his lips, showing disdain.
But recalling being severely injured by this Heart Demon of Naruto not long ago, forced to the point of almost needing to activate 'Izanagi' to save himself, the raised corner of his mouth retracted.
Jiraiya was somewhat speechless, thinking to himself: "What is that guy Minato doing!"
He thought Minato's intervention had resolved everything, but unexpectedly, Minato left this Heart Demon of Naruto behind.
Yakumo was stunned speechless.
Naruto and Menma reconciling, wouldn't it become a symbiotic relationship like her and Ido? This surprised her quite a bit.
Menma didn't say much. His spiritual body strength wasn't enough to support him leaving Naruto's body for a long time. Before returning to Naruto's body, he gave Yakumo a meaningful look.
Back in Naruto's inner world, Menma said calmly: "Naruto, I finally figured something out!"
Naruto asked: "What is it?"
The Yin Nine-Tails dozing behind the iron bars also pricked up its ears.
During those years sealed in the Shinigami's belly with the Fourth Hokage, it had long established mutual trust with the Fourth Hokage. So when the Fourth Hokage entrusted Naruto and Menma to it, although it didn't agree verbally, it had actually agreed in its heart.
Menma looked confident: "Yakumo is like you, hiding a Heart Demon in her inner world, a Heart Demon belonging to her!"
"What!?"
Naruto was greatly surprised.
"Remember the time at the Waterfall of Truth?" Pausing, Menma said with certainty: "That guy who rushed in to attack me should be Yakumo's Heart Demon!"
Naruto recalled that scene and asked: "So that's how it is, but why did Yakumo's Heart Demon attack us?"
Menma explained: "To be accurate, she attacked me!"
"Huh?"
Naruto was stunned.
Menma sneered: "As for the reason! Maybe she wanted to absorb me to strengthen herself, or maybe she wanted to help you get rid of me! It's just that she underestimated me too much and was easily countered by me! Heh, if she hadn't slipped away fast, she would have died at my hands!"
Naruto said: "I knew Yakumo wouldn't harm us!"
Menma grinned: "Not necessarily!"
Naruto hurriedly asked: "What do you mean?"
Menma glanced at Naruto: "Do you remember the data on Akatsuki's 'D'?"
Naruto shook his head immediately.
Data and such were his biggest headache. Even though the village specifically asked him to understand the data of all Akatsuki members because he was a Jinchuriki, he only skimmed through it.
"Idiot!" Menma glared at Naruto, then said: "Akatsuki's 'D' has a mysterious identity, only appearing as a spirit several times. According to the analysis of the Hidden Leaf Intelligence Division, the opponent is very likely a ninja who has practiced the 'Spirit Transformation Technique'."
Naruto was puzzled: "So?"
Menma said: "Didn't I just leave the inner world? I can do it, and Yakumo's Heart Demon can do it too, just like when she raided me in the Waterfall of Truth last time! So not only ninjas who have practiced the 'Spirit Transformation Technique' fit the characteristics of Akatsuki's 'D', ninjas possessing a Heart Demon also fit!"
Naruto stared wide-eyed: "You suspect Yakumo is Akatsuki's 'D'?"
"Otherwise, why did she try so hard to hide the fact that she has a Heart Demon?" Snorting lightly, Menma continued: "Looking at it now, she hasn't used her full strength in so many tough battles before. Her true strength is far stronger than we imagined! Tell me, what is she hiding?"
Naruto still found it unbelievable: "But... but she is Granny Tsunade's disciple! Jiraiya-sensei told me that Granny Tsunade has been cultivating her, and she is very likely the next Hokage of the village. How could she be an Akatsuki member!"
"Hmph, what's impossible about that!" Menma's gaze sharpened, saying: "Not only her, I also suspect Uchiha Sasuke is Akatsuki's 'E'!"
Naruto was angry: "You're talking nonsense!"
Menma retorted: "Then explain, why didn't Sasuke use the Mangekyo Sharingan's dojutsu when he was framed by Danzo in the hospital and driven to desperation?"
Naruto hurriedly said: "That was because his pupil power was exhausted at that time!"
"Oh, pupil power exhausted!" Menma smiled, changing the subject: "Then how did he use 'Susanoo' to shoot me down from the sky?"
Naruto was speechless for a moment.
Because Sakura had privately revealed to him that according to Tsunade's examination report for Sasuke, the upper limit of the Mangekyo Sharingan's pupil power could not recover on its own over time. Use a little less, until it completely dried up!
Menma said: "Naruto, please open your eyes and take a good look at those partners around you! Counting one by one, none of them are simple! If you don't want to die inexplicably one day, you must improve your strength properly. Father doesn't have a second Nine-Tails for us!"
Naruto nodded: "I will work hard! But I firmly believe that Sasuke, Yakumo, and the others have no malice towards me, whether they are Akatsuki members or not! Menma, I also ask you to open your eyes and follow me to take a good look at what bonds are!"
"Hmph!"
Menma snorted, but eventually nodded.
Then, Menma shifted his gaze to the Yin Nine-Tails behind the iron bars: "That is the legacy Father left us. Naruto, you have to work hard next!"
"Mhm!"
Naruto's gaze was firm.
The Fourth Hokage not only gave the Yin Nine-Tails to Naruto and Menma, but at the same time, he also passed on the 'Kurama Mode' he figured out, as well as his experience and insights in practicing 'Sage Art', to Naruto through the Yin Nine-Tails.
This was the Fourth Hokage's last legacy!
It was also the strategy guide for Naruto to master the Nine-Tails chakra and become a true Jinchuriki. Because Menma had already mastered 'Great Spiralling Ring' and 'Nine-Faced Sutra', his understanding of Nine-Tails chakra was set and difficult to change, so 'Kurama Mode' could only be conquered by the pure-hearted Naruto!
And once Naruto mastered 'Kurama Mode', he could become a veritable perfect Jinchuriki, fully unleashing the power of the Nine-Tails within his body.
At that time, he would no longer be the one needing protection, but could stand up as a powerhouse to protect others!
This was the Fourth Hokage's greatest expectation for him!