Itona Horibe is one of the standout characters in the widely acclaimed anime Assassination Classroom, also known as Ansatsu Kyoushitsu. As a student at Kunugigaoka Junior High School, he becomes part of Class E—often referred to as the “End Class” or “Assassination Classroom”—a group of misfit students tasked with the unusual challenge of assassinating their alien teacher, Koro-sensei.

At first glance, Itona comes across as cold and detached, showing little emotion or interest in his surroundings. However, as the series progresses, viewers witness a gradual transformation in his demeanor. Through the influence of his classmates, he slowly opens up, revealing a more approachable and even loyal side to his personality.

Itona Horibe is not just another student—he’s a trained assassin, raised from a young age to carry out deadly missions. His presence in Class E is initially shrouded in mystery, as his true motives remain unclear. With his distinctive appearance—shaved head, piercing yellow eyes, and facial tattoos—he stands out visually as much as he does in terms of skill.

Despite his quiet nature, Itona is remarkably intelligent and excels academically. He has a particular talent for technology and often uses his expertise to enhance the weapons and tools used by Class E. His analytical mind allows him to quickly assess situations, identify weaknesses, and devise effective strategies—making him an invaluable member of the team.

As the story unfolds, Itona’s relationships with his classmates deepen. He begins to trust and depend on them, forming especially strong bonds with Karma Akabane and others in the group. Although his past as an assassin is filled with secrecy and isolation, he ultimately chooses to stand by his friends, helping them achieve their ultimate goal of assassinating Koro-sensei.

In terms of personality type, Itona Horibe is often associated with the INTP (Introverted, Intuitive, Thinking, Perceiving) classification. He is naturally introverted, speaking only when necessary or when his expertise is needed. He tends to remain composed under pressure, observing and analyzing rather than reacting emotionally.

His intuitive side allows him to think abstractly and approach problems in unconventional ways. He enjoys understanding complex systems and mechanisms, which explains his interest in robotics and engineering. As a thinker, he prioritizes logic over sentiment, and his perceiving trait makes him adaptable and open to changing plans when needed.

While it’s important to remember that fictional characters may not perfectly align with real-world personality models, Itona’s behavior and traits strongly suggest an INTP profile.

Looking at Itona Horibe from an Enneagram perspective, he also fits the characteristics of Type 5, known as The Investigator. These individuals are typically analytical, curious, and observant, often stepping back from emotional situations to process information more clearly.

Itona’s fascination with the octopus-like creature introduced by Karma highlights his inquisitive nature. He is drawn to understanding how things work and is always eager to uncover new knowledge. His tendency to observe rather than engage directly also points to a preference for intellectual detachment over emotional involvement.

Moreover, Enneagram Type 5s often seek knowledge and retreat into their minds to feel secure. Itona’s intense desire to learn from his opponents and improve his skills aligns well with this pattern. His early social awkwardness can also be seen as a way to avoid emotional exposure, which is typical of Type 5 individuals.

In conclusion, Itona Horibe from Assassination Classroom exhibits traits consistent with both INTP personality type and Enneagram Type 5. His analytical mind, emotional restraint, intellectual curiosity, and adaptability all point toward a character who thrives in the realm of ideas, observation, and strategic thinking.