Black Reaper Kaneki stands out as one of the most compelling characters in the anime Tokyo Ghoul. Originally introduced as a kind-hearted and introverted individual, Kaneki undergoes a dramatic and harrowing transformation in the third season of the series. Following the intense psychological and physical trauma inflicted by Jason, he begins to suppress his emotions and gradually evolves into the terrifying figure known as Black Reaper Kaneki.

This shift marks a significant departure from his earlier self. Where once he was gentle and empathetic, Black Reaper Kaneki becomes cold, calculating, and even sadistic. His change in demeanor is largely fueled by the betrayals he experiences—not only from the CCG but also from those he once considered close allies, such as Amon and Touka. As a result, he becomes increasingly withdrawn, emotionally detached, and willing to embrace violence as a means of control and retribution.

In this new form, Kaneki strikes fear into both humans and ghouls alike. His distinct black and white appearance mirrors the duality of his nature—once innocent, now corrupted. He employs unpredictable and brutal tactics in battle, making him a formidable opponent. His sheer power and ruthless efficiency earn him a reputation as one of the most feared beings in the Tokyo Ghoul universe.

Despite his darker tendencies, Black Reaper Kaneki remains a deeply layered character. Beneath the surface of his brutality lies a strong sense of loyalty and a desire to protect those he cares about. However, his methods are extreme and often morally ambiguous, reflecting the internal conflict between his humanity and his ghoul instincts. This complexity makes him a fascinating figure, embodying the consequences of trauma, vengeance, and the corrupting nature of unchecked power.

When it comes to personality typing, Black Reaper Kaneki could fit either the INTJ or ISTJ archetype. As an INTJ, his strategic mindset, independence, and analytical nature shine through. He consistently plans ahead and makes calculated decisions, often isolating himself to maintain control. His introverted nature and logical approach to problems further support this classification.

On the other hand, his ISTJ traits are equally evident. He is methodical, disciplined, and values structure, especially in how he operates within Aogiri Tree. His strong sense of duty, adherence to personal principles, and meticulous approach to combat suggest a deep-rooted sense of responsibility and tradition.

Regardless of which type he aligns with more closely, Black Reaper Kaneki is undeniably a person of strong will and conviction. He is driven, self-reliant, and unyielding in his pursuit of his goals. His personality is marked by a blend of strategic thinking, discipline, and an unwavering commitment to his own moral code.

From an Enneagram perspective, Kaneki also exhibits characteristics of Type Eight, known as “The Challenger.” This type is defined by a need for control, a strong aversion to weakness, and a tendency to act assertively in the face of adversity. Kaneki embodies these traits through his refusal to be dominated, his aggressive defense of those he cares about, and his deep-seated fear of being vulnerable.

As the Black Reaper, these tendencies intensify. He becomes more aggressive, more dominant, and increasingly isolated. His emotional walls grow thicker, and his sense of individualism becomes more pronounced. While this persona gives him strength, it also distances him from others, ultimately leading to a sense of loneliness and inner turmoil.

In essence, Black Reaper Kaneki represents the darker side of resilience and self-reliance. His journey reflects the cost of power when it is wielded without emotional balance, and the dangers of isolation when one chooses to bear the weight of the world alone.