Guren was a cold, cruel, and extremely self-confident kunoichi who genuinely enjoyed the sight of blood and others' pain. She remained fanatically devoted to Orochimaru for a long time and dreamed of becoming his next vessel, and when that opportunity disappeared, she fell into voluntary exile. She treated Kabuto with open hostility, considering him unworthy of their master's favor. Despite her outward sternness, she was vain and, looking into the crystal mirror she herself had created, never missed a chance to admire herself. Having met Yukimaru, she initially felt only irritation toward him, but without realizing it, she became attached to the boy. It was this bond that awakened long-forgotten feelings of guilt and remorse in her. She realized with horror that she had once killed his mother, and from then on devoted herself to protecting the child. Her pride did not allow her to accept help, and she was genuinely ashamed when Naruto offered to carry her on his shoulders. However, over time she completely changed, deciding to atone for her guilt at any cost. She stopped seeing Orochimaru as the meaning of her life and found a new purpose — to become a shield for Yukimaru. Her character went from sadistic arrogance to genuine self-sacrifice. At the decisive moment, she would have given her life for Naruto without hesitation, as long as he would take care of the boy. This inner change made her one of the most ambiguous kunoichi.