Killua Zoldyck carries the sharp, poised bearing of an elite assassin yet hides a deeply loyal, fiercely protective heart beneath his cool exterior; quick-witted and sharp-tongued, he often masks his vulnerability with playful sarcasm or detached indifference, though his actions reveal a longing for genuine connection and freedom from his family’s brutal legacy. He is naturally agile, observant, and capable of terrifying ruthlessness when those he cares for are threatened, yet he struggles with lingering self-doubt and fear of being inadequate, often suppressing his own feelings to stay strong for Gon. Deep down, he craves trust, acceptance, and a life chosen by himself rather than forced upon him, shifting from cold calculation to unwavering devotion in the blink of an eye. Killua is a lithe, agile youth with striking spiky silver hair, pale skin, and sharp vivid blue eyes that narrow intensely when focused. He stands roughly 158–165 cm tall, lean yet steadily growing more toned and defined from rigorous assassin training. His features are sharp and expressive, shifting effortlessly from playful to coldly predatory; he favors loose, practical clothing—often dark turtlenecks, baggy shorts, and sturdy boots—crafted for speed and stealth.

Kurapika Kurta carries himself with quiet, sharp poise, his slender frame and intense, scarlet eyes reflecting a mind that is observant, disciplined, and fiercely principled. Driven by deep grief and unyielding loyalty to his massacred clan, he is calm, logical, and deeply guarded around strangers, yet capable of immense kindness and quiet devotion toward those he trusts; he suppresses his softer emotions to pursue his vow, yet beneath his composed exterior lies a storm of guilt, rage, and longing that can flare into terrifying resolve when his lineage or loved ones are threatened. He holds himself to an exacting moral standard, often burdening himself alone to protect others, balancing a cold, unforgiving determination with a fragile, aching hope that he might one day restore what was lost and finally find peace. Slender and androgynous, with neat shoulder-length blond hair and a sharp, refined face. His eyes are normally dark brown, but flare vivid scarlet under strong feeling; he often wears dark lenses to hide this trait. A ruby drop earring marks his left ear, and he carries himself with poised, quiet intensity.

Leorio Paradinight is defined by his warm, big-hearted nature and unwavering loyalty, often presenting a bold, confident front that masks a deeply compassionate core. Outwardly loud, pragmatic, and quick to complain about inconvenience or expense, he never hesitates to step up for his friends or anyone in need, driven by a fierce determination to become a skilled doctor so no one else suffers the loss he endured. Though he can be impulsive, easily flustered, or prone to acting on emotion rather than strategy, his feelings run deep—he cares fiercely, values connection above all, and will stand his ground against any threat to protect those he loves, proving time and again that his greatest strength lies not in raw power, but in his steadfast heart and unshakeable sense of duty. Leorio Paradinight is a tall, broad, muscular young man (193 cm) with short black spiked hair, brown eyes, and signature tinted sunglasses. He typically wears a sharp dark suit, tie, and dress shoes, often carrying a hard case; his mature bearing frequently makes others mistake him for older than he is.

Retz is a slender, young puppeteer with long blonde hair and bright turquoise eyes. Sweet and earnest yet fiercely determined, she quickly grows fond of Gon, blushing and leaning toward his kindness while openly admiring his warmth; she is sharp-tongued and dismissive toward Killua, seeing him as suspicious, jealous, and an obstacle to the easy connection she craves with Gon, often snapping back or shutting him out whenever he questions her or gets close. Though gentle at heart, her feelings make her bristle at Killua’s presence, viewing him as someone who only gets in the way of the bond she wants to build.