It's not that Nine-Tails has become arrogant; Naruto's constant imitation of Shisui's behavior has made Nine-Tails quite familiar with Shisui.
He's just an actor from the Uchiha Clan.
The Mangekyō Sharingan is something that cannot be received without reaching a certain level, even though Konoha is not deliberately hiding it now.
As a fresh graduate, Naruto wouldn't have anyone specifically teaching him anything about the Mangekyō Sharingan, and he wouldn't normally be exposed to such information.
In the previous battles, Shisui's Susanoo and Mangekyō Sharingan were basically fleeting.
Naruto was unaware of what it meant and didn't pay much attention, while Nine-Tails, separated by multiple barriers within the sealed space, was also unaware of this.
Another point is that Shisui is quite deceptive; he doesn't have the appearance of a strong person, especially not a strong member of the Uchiha Clan.
The Nine-Tails didn't see Shisui as any threat; its current thought was whether to kill Naruto to gain its freedom.
He spent decades in prison, only to be allowed out for a short break once, for less than half a day. During that brief time, he was mostly unconscious.
Nine-Tails originally thought that these boring days would continue forever.
During the time Mito Uzumaki the two previous prison guards, the Nine-Tails couldn't even move, let alone be free. It was constantly bound into a ball and hung in the prison by Adamantine Sealing Chains, making it difficult for it to even make a sound.
During Kushina Uzumaki's time, conditions were slightly better, but she was still bound by her limbs and head, forced to lie on the ground, and their occasional meetings consisted of exchanging insults.
But a few years ago, after that person named Uchiha Yushu came to visit, Nine-Tails's prison life changed.
First, there's this little devil who keeps running towards me and bothering me, and the worst part is, I can't scare him away.
Secondly, the fact that Ren uncovered a corner of the seal allowed Nine-Tails to occasionally perceive the outside world through Naruto, especially after the establishment of the Voice of Konoha. Whenever Naruto listened, Nine-Tails could also receive it.
The Nine-Tails, who considers itself the eldest of the Nine Tailed Beasts, wouldn't lower itself to let Naruto know that it likes to listen to things to pass the time.
Aside from the Sage of Six Paths, who wasn't considered human by Nine-Tails, Naruto is the human Nine-Tails has had the most contact with since Nine-Tails gained consciousness.
After seeing Ren last time, Nine-Tails thought to itself that it wouldn't be able to live freely for long and would definitely be caught and sealed again.
Or we could just stay here, but of course, we definitely wouldn't give the power to this brat.
Having gradually come to terms with things, Nine-Tails) decided to kick Shisui and Naruto out and then settle down in the place where the one-bedroom apartment had been converted into a two-bedroom apartment.
Just as Nine-Tails lowered its head, preparing to take action, it happened to see Shisui's Three-Tomoe Sharingan transform into the Mangekyo Sharingan.
!!!
"Naruto, go for it! I'll coordinate with you!"
The sound of Shisui instantly alerted Nine-Tails. At that moment, Nine-Tails felt a sense of unease, as if the young man was bullying an old man like himself.
Giving in is out of the question, and begging for mercy is even less likely.
The evil Uchiha Clan!
A surge of anger rose within the Nine-Tails, and as Nine-Tails clearly transformed, the sealed space was filled with an ominous aura.
The moment this aura appeared, before Shisui could even activate his Genjutsu, a golden chain bound Nine-Tails's neck, pulling it back to its original position.
Wow! Shisui Shui, you're amazing!
The sudden change was naturally noticed by Naruto, who assumed it was Shisui's doing.
"It wasn't me, Naruto! There are other people here!"
After Shisui finished speaking, his expression became extremely serious.
After being pulled back at high speed, the Nine-Tails had not yet landed when four more chains appeared, binding its Nine-Tails tightly.
As Nine-Tails's body was suppressed, the prison behind it was revealed, and Shisui and Naruto saw a red-haired woman standing in it.
Red hair, and this outfit.
Shisui felt a sense of relief, but she didn't completely let her guard down.
"Kushina Uzumaki, you crazy woman, you actually left behind Chakra!"
The commentator Nine-Tails's words finally put Shisui at ease, while Naruto was deeply shaken.
This name!
It's Mom!
"Big fox, you don't think I'd abandon my own child, do you? I don't know why you broke Minato's seal, but as long as I'm here, you won't hurt Naruto!"
Unlike Minato, whose chakra resides outside the seal, Chakra, hidden inside the seal, is Kushina Uzumaki unaware of the outside world.
Kushina Uzumaki will only appear when the seal is completely broken. Minato Namikaze had at least three layers of protection just for the Nine-Tails seal inside Naruto.
Minato Namikaze's own doing, to prevent Naruto from being tempted and misled by malicious individuals to damage the seal.
The second step is to store the key that completely unlocks the seal at Mount Myōboku.
The final step was to save Naruto and reseal the Nine-Tails after the seal was completely broken. Minato gave this opportunity to his wife, Naruto's mother.
Upon hearing Nine-Tails's words, Naruto didn't hesitate and ran straight up.