In Naruto, Kurama is one character who has undergone a major transformation. Who was one feared by all and seen as a symbol of destruction and rage, he evolved into a trusted companion to Naruto Uzumaki. This companionship helped the main character grow not just as a shinobi, but also as a person.
When viewers are first introduced to Kurama, he is a villain forced to be sealed off inside a boy. But over time, his character arc defied every expectation. Kurama wasn't simply a monster. He was misunderstood, manipulated, and wounded by a cycle of hatred that mirrored the pain of the very world he inhabited.
Then we get more information about him. Kurama was never born to be evil. All the tailed beasts were once part of the Ten-Tails, a monstrous creature that threatened the world. When the Sage of Six Paths, Hagoromo Ōtsutsuki, defeated the Ten-Tails, he split its chakra into nine separate entities, thus creating the tailed beasts. Kurama, the Nine-Tails, was the strongest of them.
While Hagoromo treated the beasts as individuals with feelings, his descendants were the ones who saw them as weapons. Kurama, like the others, was hunted, sealed, and used for war. The bitter environment he lived in shaped him into a fearsome and aggressive being.

After generations passed by and no one seemed to see Kurama to be more than a weapon, he acted out. In all entirety, he was the victim of the world’s inability to understand him. Sealed inside the main character as a baby after Kurama attacked the village, he becomes a source of fear and loneliness for the boy.
At this point, Kurama is still presented as malicious, constantly trying to trick the protagonist into using his chakra in a way that benefits him. He lashes out, whispers dark thoughts, and waits for opportunities to break free of the seal.
A turning point comes during Naruto’s fight with Pain. Kurama, sensing his emotional turmoil, tempts the protagonist with his chakra. But he resists. He doesn’t give in to rage. Instead, he begins to ask why Kurama hates humanity so much. For the first time, there was someone who asked him about his feelings and thoughts.
It was noticed by him, and from that day, he too began noticing that the protagonist does not treat him as a burden but as something entrusted to him. Finally, everything changes during the Fourth Great Ninja War. It was finally time for Kurama to entrust Naruto with his power, but now not just as a weapon but as partners.
From that moment on, they fight side by side. Kurama no longer tries to overpower him. Instead, he offers advice, protects him, and even teases him. Their banter becomes playful, even warm. The once-demonic fox now refers to Naruto as his comrade.
Kurama, the mentor: Wisdom born of pain in Naruto
This nine-tailed beast's transformation is not just reflected in the behavior change but also in what he represents. As a mentor, Kurama brings not just strength to Naruto but clarity. He warns him when he’s pushing too hard. Their relationship is more evidently seen in Boruto, as Kurama watches over Naruto not just as a source of chakra, but as an older voice of reason.
When Naruto is faced with a god-tier threat in Isshiki Otsutsuki, Kurama offers a solution: a temporary power called Baryon Mode. This form grants Naruto immense strength, but at a deadly cost. What he doesn’t realize is that the cost isn’t his own life. It’s Kurama’s.
Kurama lies to him, telling him they will both die. This is the ultimate sign of Kurama’s growth. Once a creature who hated humans, who resented being sealed and used, Kurama now gives his life to save one.
In conclusion, Kurama’s character arc is one of the most beautifully written arcs in the series. His story started off as a loner who was feared by everyone, but at the end of it, as a story of love, sacrifice, and shared purpose. And for us fans, he became unforgettable, not just for his power, but for his heart.