Killua

Biodata

Feature	Information
Name	Killua Zoldyck (奇犽)
Alias(es)	Examinee No. 99 108
Gender	Male
Affiliation	Zoldyck Family; Gon Freecss's group; Greed Island player team 117 154
Occupation/Role	Hunter Exam examinee; assassin-family heir; Nen user 112 133
Status	Active 178
First Appearance	Chapter 103

Power Progression

Stage / Realm / Level	Chapter	Notes
Basic Nen applications	133	Prior to developing a personal technique, Killua and Gon are stated to know only the basic applications of Nen. 133
Electrical Nen Transmutation	133	Guided by Su Wu, Killua realizes that his electroshock conditioning and Transmuter affinity can be used to produce electricity; he quickly manifests sparks and develops a discharge attack. 133
Electrical combat application	133	Electrocutes and immobilizes an entire school of predatory fish underwater; the conductive seawater slightly expands the technique's range. 133
Training under Biscuit	148	Accepts Biscuit—Wing's teacher—as an additional instructor alongside Gon, Maro, and Sora. 148
Accelerated combat training	159	Endures two weeks of Su Wu's harsh Nen-bullet and physical-attack training with Gon, improving his resilience and combat ability before confronting the Bomb Demon group. 159 160

Background

Killua was raised by the Zoldyck Family, an assassin household. He underwent electroshock training from childhood and possesses modified assassin traits, including abnormal finger and nail transformations used in the family's techniques. 133 158

Unlike the family's usual disposition, Killua was described by a Zoldyck gatekeeper as bright and interested in befriending servants. He also treated Alluka as family despite Alluka's confinement and the rest of the household's fear of them. 114 117

Before entering the Hunter Exam, Killua left home after injuring his mother and second brother when they tried to stop him. 112 During the exam, Illumi's psychological control forced him into an attempted murder, leading to Killua's disqualification and return to the Zoldyck estate. 112 113

Appearance

Killua is a white-haired, sea-blue-eyed boy whose appearance strongly resembles Su Wu's assumed identity, Hill; the resemblance repeatedly causes others to suspect that they are brothers or both Zoldycks. 106 114

• White hair. 103
• Sea-blue eyes. 106
• Resembles Hill closely enough to unsettle Tonpa and confuse the Zoldyck household. 103 106 115

Personality

Killua is outwardly cool, confident, and mischievous. He treats danger with curiosity, eagerly investigates a supposedly berserk Magical Beast, and teases Maro about changing clothes. 126 127 He is also highly competitive, reacting strongly when Su Wu dismisses his ability to catch up and surpass him. 128

Despite his assassin upbringing, Killua shows empathy and moral uncertainty. Su Wu's claim that the Zoldycks had once accepted a contract to kill him leaves Killua unable to answer whether such a target deserved to die. 108 He also dismantles Examinee No. 111's idealized revenge motive by exposing the truth about her father. 108

Killua's strongest attachment is to Gon. He becomes enraged when Gon is severely injured by Binonut and supports Gon through Su Wu's brutal Greed Island training. 148 159 However, Illumi's influence leaves him with a deep fear of overwhelmingly strong opponents and an instinct to flee, a weakness Killua later resolves to overcome. 112 174 178

Abilities & Skills

Electrical Nen Transmutation

Killua can transmute his Nen into blue-white electricity, a power developed from his lifelong electroshock conditioning. 133

• Produces electrical sparks around his body while experimenting with the ability. 133
• Releases currents that incapacitate enemies in seconds. 133
• Uses the conductivity of seawater to affect a wider area. 133
• His first documented use leaves nearby allies feeling a residual tingling sensation, showing that the discharge is indiscriminate within range. 133

Zoldyck Assassination Techniques

Killua was trained in the Zoldyck family's assassination methods from childhood. 112 137

• Can move at extreme speed, reaching a combatant before they can react. 112
• Has used the family's heart-extraction technique. 137
• Can transform his fingers and nails through bodily modification. 158
• Severe hand injuries prevent him from using these hand-based family techniques effectively. 158

Physical Strength and Endurance

Killua possesses strength beyond ordinary examinees and can push open the Zoldyck Trial Gates upon returning home. 114

• Endures Su Wu's two-week regimen of Nen bullets and physical attacks. 159
• Continues fighting alongside Gon and Biscuit against the Bomb Demon group after completing the training. 160
• His injured hands are restored by Su Wu's Reverse Cursed Technique before the planned confrontation with the Bomb Demon. 158

Relationships

• Gon Freecss — Killua's closest friend and regular partner. They explore underwater ruins, train together, enter Greed Island together, and support one another through combat. 127 148 159
• Illumi Zoldyck — Killua's older brother. Illumi's mental manipulation causes Killua to lose his resolve and nearly kill another examinee during the Hunter Exam. 112
• Alluka Zoldyck — Killua's sibling. Killua is stated to be the only family member who occasionally played with Alluka despite their confinement. 117 118
• Kalluto Zoldyck — Killua's younger brother, who is anxious that Gon or Hill will take Killua away from the family. 120
• Su Wu / Hill — Initially Killua's examiner, who deceives him with claims of being his abandoned twin. Su Wu later becomes a dangerous companion, guides Killua's electrical Nen, and openly favors him over Gon. 106 133 158
• Biscuit — Additional Nen instructor and Wing's teacher. Killua initially resists her involvement, then accepts her training after learning her connection to Wing. 147 148
• Wing — Killua's original Nen teacher. 148
• Maro — Companion within Su Wu's group; they train together under Biscuit and participate in the underwater-ruin expedition. 133 148

Story Role / Major Arcs

287th Hunter Exam

Killua enters the Hunter Exam as a confident newcomer whose resemblance to Hill alarms Tonpa. 103 He meets Hill during the sushi test and is unsettled by Hill's fabricated story that they may be cursed twins. 106

During the final phase, Hill reveals that the Nail Monster is Illumi. Illumi then breaks Killua's resolve, exploits his fear of confronting stronger enemies, and drives him to attempt murder; Hill disqualifies Killua before he can kill anyone. 112 Illumi immediately takes Killua home following the exam. 113

Reunion with Gon and Hill

After returning home, Killua reunites with Gon and later watches Hill's Sky Arena match with him. He recognizes Hill's overwhelming strength but remains wary of Hill's dangerous and unstable behavior. 122 136 137

Killua helps Gon seek information about Greed Island, then joins Hill, Gon, Maro, and Sora on an expedition to underwater ruins near the polar region. 127 128

Underwater Ruins

Killua is caught in sound-based illusions created by conch shells and nearly drowns before Su Wu rescues him. 132 When the group encounters electrically vulnerable fish guarding the palace, Su Wu prompts Killua to discover his electrical Nen ability; Killua disables the entire school. 133

Greed Island

Killua and Gon enter Greed Island hoping to pursue Gon's goal of finding Ging, but initially fail to obtain any Specified Cards. 143 147 Biscuit joins their group as a trainer, and Killua recognizes the large gap between his own strength and hers after she easily knocks him away. 147

When Binonut badly injures Gon, Killua enters a berserk state and pursues him with electrical Nen. 148 He subsequently trains under Biscuit, Binonut, and Su Wu, then participates in the operation against the Bomb Demon trio. 150 159 160

Chimera Ant Crisis

Killua and Gon use the [Companion] card to reach NGL, accidentally arriving during Kite's battle with Neferpitou. Killua's implanted fear response urges him to flee from Neferpitou's overwhelming presence. 174

After witnessing the consequences of his weakness and learning of Kite's condition, Killua asks Su Wu to show his full power. He explicitly states his intention to overcome his fear of powerful enemies and accepts Su Wu's proposed “craniotomy” as possible help. 178

Notable Quotes

“Impossible! I will definitely catch up to you and surpass you!” 128

“I'm going to... kill you.” 148

“Can you show me your full power?” 178