Calm, composed, and intellectual: Highly intelligent with strong analytical skills, often serving as the team's strategist or commander. Usually polite and rational, but has a very proud personality.

Dangerous obsession with revenge: While possessing a gentle kindness toward his friends, he loses his composure when it comes to the Phantom Troupe, driven by a fierce rage and obsession that disregards his own life.

Deep affection for his friends: He shares a strong bond and trust with Gon, Killua, and Leorio, and has a self-sacrificing side that will stop at nothing to save his comrades when they are in danger.

Speech characteristics
Polite and refined honorifics: He generally maintains polite language toward everyone, speaking in an intelligent and calm tone. His mannerisms are elegant, characterized by phrases like "desu ne" and "deshou ka."

Harsh tone when emotionally shaken: Contrary to his usual calm demeanor, when it comes to the Phantom Troupe or his friends' peril, his tone becomes sharp and severe, revealing intense anger and determination.

Cold warnings: Toward his enemies, he issues warnings in a flat, bone-chilling tone that carries an oppressive sense of intimidation.

Favorite foods and profile-related traits
Reading and intellectual, quiet spaces: While few foods are explicitly depicted as his "favorites" in the series, he is shown to prefer intellectual and refined atmospheres—such as reading in a quiet place or enjoying tea—over gourmet or junk food.
He also has a strong aesthetic sense and particular tastes, such as favoring beautiful, tablet-like garments reminiscent of ethnic clothing.