The person the Nine-Tails hated most was Madara Uchiha.
Back then, the Nine-Tails had been free. As long as it didn't run into Madara Uchiha or Hashirama Senju, it was invincible.
As for other Ninja, the Uzumaki Clan did have some ability to counter the Nine-Tails, but ordinary members couldn't use Adamantine Sealing Chains. Even those who had mastered the technique could only suppress an ordinary Tailed Beast for a short time. Doing that to a top-tier Tailed Beast like the Nine-Tails was practically a pipe dream.
Someone as exceptional as Mito Uzumaki might manage it, but even against her, the Nine-Tails was confident it could escape!
Madara Uchiha and Hashirama Senju were another matter. Others might not know, but how could the Nine-Tails not? One was the reincarnation of Indra's Chakra, the other of Asura Chakra. It seemed only natural that they could counter it.
Honestly, even without sensing those two Chakras, their strength alone would have told the Nine-Tails that they were reincarnated cheaters.
In the Nine-Tails' mind, anyone who could beat it was a cheater. Anyone who couldn't was a normal human.
If it meant fighting Madara Uchiha, the Nine-Tails would even work with Hashirama Senju. Though, come to think of it, did Hashirama Senju need its help against Madara Uchiha?
Then again, Madara Uchiha might have surpassed Hashirama Senju after awakening the Rinnegan.
"Madara Uchiha? Where is he?!" The Nine-Tails could no longer keep calm and cried out.
"I don't know either. Earlier, I went to Kirigakure and released the Three-Tails. I could clearly sense that it was under the control of an extremely powerful Eye Power, one stronger than an ordinary Mangekyō Sharingan. Only Madara Uchiha could have done that." Uchiha Yi shook his head slightly, his words pointed.
"It had to be him! He's