Genthru

Genthru is a tall, thin-faced man who wears glasses and appears as one of the players hired by Battera to clear the Greed Island game.

He becomes the de facto leader and brain of a large player coalition informally nicknamed the “Trick Group,” while secretly using them as disposable tools.

He is a Conjuration-type Nen user who can also skillfully handle multiple Nen categories.

His combat power is so high that professional Hunter Tsezguerra states that, even at his peak, he would not come close to Genthru’s level.

Genthru is the central figure of the “Bomber” incident, where he infiltrates a card-hunting group for five years, then massacres nearly all of its members to seize their cards.

He eventually becomes the final major human opponent faced by Gon Freecss during the Greed Island storyline and is defeated and captured after a brutal one-on-one battle.

His voice actors are Takeshi Koyama in the Greed Island OVA and Hiroyuki Yoshino in the 2011 anime adaptation.

Genthru is extremely intelligent, cold-blooded, and methodical.

He plans years ahead, maintains a friendly façade, and then calmly slaughters those he has worked with for half a decade without the slightest hesitation.

He openly describes psychological warfare as a matter of “making the opponent understand just how calm and insane you are.”

This philosophy guides both his negotiations and his killing style, as he deliberately demonstrates his cruelty to break his targets mentally.

Despite his cruelty, he is not a chaotic berserker.

He is calm, analytical, and pragmatic, willing to negotiate when it advances his goals and to restrain himself if slaughter is tactically disadvantageous.

However, he does possess genuine attachment to his true allies, Sub and Bara.

He insists that when they “cross a dangerous bridge,” all three do it together, and after his defeat he pleads with Gon’s group to heal the gravely injured Bara with the “Breath of Archangel” card.

His biggest psychological weakness emerges in his fight with Gon Freecss.

Gon chooses tactics that no “sane” fighter would use—such as sacrificing both arms just to land a single decisive blow—and Genthru, who prides himself on his own “insanity,” is actually shaken by someone even more unhinged than he is.

Early Involvement on Greed Island

Genthru enters Greed Island as one of the players funded by Battera, a wealthy client desperate to clear the game.

Within the game, Genthru joins and helps form a large cooperative group dedicated to collecting spell cards and specified cards efficiently.

This group, later nicknamed the “Trick Group” by Killua Zoldyck, starts with about ten initial core members, including Genthru, Nickes, and others.

Over five years, the group grows to around sixty players, united by a promise to clear the game together.

Genthru presents himself as a helpful teammate and strategist.

He participates in recruiting new players, appears at briefings to explain group rules and strategies, and earns the trust of the entire organization.

Revelation as the Bomber

Once the group has obtained around 90 types of specified cards, Genthru decides it is time to execute his real plan.

At a large gathering, he calmly announces to the assembled members, “I am the Bomber,” revealing his true identity as the notorious player killer.

He then exposes that he has already attached his lethal Nen bombs to every member present using his ability “Countdown.”

When a member named Jispa attempts a surprise attack from behind, Genthru casually grabs his face and detonates it with “Little Flower,” instantly killing him and silencing the others through sheer terror.

He kindly—but chillingly—explains the rules and supposed “disarm conditions” of the bombs, offering a false hope of survival.

In reality, he plans to use the fake “disarm” ceremony to execute everyone at once.

Massacre of the Trick Group

Genthru’s long-term plan is simple: use the group to gather specified cards, then kill them and take everything.

Together with his true partners Sub and Bara, he manipulates the group into performing a ritual they believe will deactivate the bombs.

When the group has gathered 90 specified cards, Genthru, Sub, and Bara press their right thumbs together and say “Release.”

The members think this will解除 their bombs; instead, it triggers an immediate mass detonation, killing over sixty people almost simultaneously.

Only Abengane, a powerful Exorcist-type Nen user, anticipates that “Release” might be a forced detonation rather than a disarming function.

He uses his exorcism ability to remove his own bomb just in time and survives.

Genthru then collects the specified cards the dead group had gathered.

With these cards, he comes very close to clearing Greed Island before Gon’s team stops him.

Conflict with Tsezguerra’s Group

Genthru’s actions make him infamous across the island, and the alias “Bomber” spreads among the players—this is actually part of his strategy, as the name itself is a condition for his main ability.

Professional Hunter Tsezguerra forms a team to oppose Genthru and tries to protect key cards from him.

Genthru counters by hunting down players he thinks are connected to Tsezguerra.

He kills them ruthlessly, using both his explosion ability and his psychological warfare, sending severed heads as “messages” to intimidate opposition.

At one point, Genthru lectures a negotiator named Puhat about how to handle bargaining.

Then, to demonstrate his philosophy, he simply blows Puhat’s neck off and sends the head back to the others, proving he is both calm and utterly deranged.

Tsezguerra, a highly skilled and experienced Hunter, evaluates Genthru and concludes that even if his own body were in perfect shape, he still would not reach Genthru’s level.

He labels Genthru a “pure combat type,” recognizing that his Nen is optimized almost exclusively for killing.

Eventually, Tsezguerra’s team is forced out of the game, unable to stop Genthru directly.

This sets the stage for Genthru’s direct confrontation with Gon’s group.

Climax Against Gon’s Team

With almost all the required specified cards in hand, Genthru focuses on the remaining ones held by Gon Freecss, Killua Zoldyck, and Biscuit Krueger.

He tracks them down and confronts them, intending to either negotiate under threat or simply kill them and take their cards.

Gon, however, has been anticipating this showdown for a long time.

He trains specifically to surpass Genthru and creates a multi-layered plan to neutralize Genthru’s abilities and land a single decisive blow with his “Jajanken” technique.

In the battle, Genthru initially dominates.

His close combat is superior, his experience is deeper, and his Nen abilities are optimized for lethal close-range engagements.

He uses “Little Flower” to destroy Gon’s arms, believing that without both arms, Gon is effectively finished.

However, Gon deliberately sacrifices his arms, having already decided that trading them for one clean punch is worth it if that punch ends the fight.

Gon’s plan includes measures to block “Countdown”, trap Genthru’s movements, and bait him into underestimating Gon’s resolve.

In the end, Genthru is caught by this strategy, his Nen abilities are effectively neutralized, and he takes a fully charged Jajanken: Rock directly.

The blow incapacitates Genthru, and he is captured.

Gon’s team then takes back the specified cards Genthru had stolen through years of deceit and murder.

Treatment of Sub and Bara After Defeat

Even after being defeated, Genthru’s concern for Sub and Bara surfaces.

When Bara is gravely injured by Biscuit Krueger, Genthru’s primary request is not his own safety but protection and healing for his partner.

He asks Gon and his allies to use the high-level healing card “Breath of Archangel” on Bara.

This shows that, despite being a serial killer who has casually murdered dozens, he still experiences deep loyalty and camaraderie—though only toward his chosen inner circle.

Genthru’s primary Nen category is Conjuration, but his main trump card techniques are multi-category and extremely advanced.

His specialty is killing; nearly all of his abilities are designed with the explicit aim of causing lethal damage rather than capturing or immobilizing.

General Combat Ability

Genthru is an elite hand-to-hand combatant with excellent mastery of basic Nen techniques such as Ten, Zetsu, Ren, and Gyo.

He integrates Nen and physical combat seamlessly, fighting at close range while timing his explosions with precision.

His overall combat ability is recognized as extremely high even among professional Hunters.

Tsezguerra, a one-star Hunter, explicitly states that a group of 60 average Nen users would not be able to defeat Genthru.

Unlike many Nen users who design versatile powers with multiple applications, Genthru’s skillset is highly specialized toward killing opponents outright.

This hyper-lethal design is considered abnormal within the Hunter × Hunter world, where most professionals prefer abilities that incapacitate or restrain rather than outright kill.

Little Flower (One-Handful of Fireworks)

Japanese name in the original work: “Little Flower” (often glossed as “One-Handful of Fireworks”).

Type: Primarily treated as a Transmutation-style attack using explosive aura, though thematically connected to his Conjuration theme of bombs.

Function:

Little Flower allows Genthru to cause an explosion on anything he physically grabs with his hand.

The maximum size of an object he can effectively detonate is about that of a basketball.

The explosion is generated on the inside of his closed fist, at the point of contact with the target.

It is designed as an anti-personnel ability; if the opponent’s defensive aura is insufficient, the explosion can at least disable the limb or often blow it off entirely.

Self-Protection Mechanism:

Because the explosion occurs right where his hand is touching, Genthru would normally be injured by his own attack.

He solves this by using two different applications of his aura simultaneously: one portion is allocated to produce the explosion, while an even larger portion is concentrated as “Ken” around his hand to shield it.

This means the maximum power of the explosion is limited by what his own aura can withstand.

However, Genthru’s aura capacity is so high that even Gon Freecss needed around attack-defense power 90 in his aura concentration to block a Little Flower explosion.

Genthru can also defend against both the explosion and the resulting shrapnel or secondary effects if his aura allocation is sufficient.

Because he needs to reinforce his hand whenever he plans to use Little Flower, an attentive opponent might predict when the ability is coming if they can read his aura.

Tactical Considerations:

A known weakness is that if Genthru only reinforces his hands when he plans to explode something, an opponent can watch for the shift in his aura and anticipate an incoming Little Flower.

To counter this, Genthru can keep both hands constantly in a high-aura defensive state, making it impossible to tell when he will actually trigger an explosion.

This strategy, however, drains aura from the rest of his body, lowering his overall defense.

Even so, unless his opponent vastly outclasses him in physical skills or, like Gon, is insane enough to sacrifice their limbs just to land a hit, the trade-off is usually acceptable.

Little Flower’s explosion is not some exotic, reality-breaking blast; it behaves like a powerful but “normal” explosion.

For example, it can ignite gasoline or other flammable materials if used nearby.

Countdown (Sound of Life)

Japanese name in the original work: Often referred to as “Countdown.”

Type: A joint Nen ability combining Manipulation, Emission, and Conjuration, performed by Genthru together with Sub and Bara.

Function:

Countdown allows Genthru to attach a timer-style Nen bomb to a target’s body.

The bomb is a conjured explosive linked to the target’s heart rate and detonates once a certain count is reached.

To set up Countdown, two conditions must be fulfilled:

1. Genthru must be touching the target while saying the word “Bomber.”

2. Genthru must verbally explain the ability’s rules and its disarm method to the target.

Once both conditions are fulfilled, a Nen bomb appears at the point of contact and begins counting.

The conditions do not need to be fulfilled in a specific order; they can be separated in time, and the bomb will still activate once both are completed.

Genthru can attach bombs to multiple people simultaneously.

The timer is not based on time in seconds, but on the target’s heartbeat: the bomb detonates once it has counted 6000 heartbeats.

If the target’s heartbeat accelerates due to fear, excitement, or injury, the countdown speeds up and the bomb detonates sooner.

The bomb’s destructive power is roughly ten times that of Little Flower, making it almost guaranteed to kill the target on detonation.

The bomb’s appearance is distinctly ominous and monstrous when visualized, as seen when Abengane confronts the nen beast that represents the cursed bomb during exorcism.

The ability’s construction uses Genthru’s strengths combined with Sub’s and Bara’s Nen to cover multiple categories at a high level of precision and power.

Disarm Condition:

To解除 Countdown, the target must touch Genthru and say, “We caught the Bomber.”

If this condition is met, the bomb is removed.

Notably, the countdown’s linkage to heartbeats is not required to be explained to the victim for the bomb to function.

In other words, Genthru only needs to describe the parts he chooses to, as long as he satisfies his own binding conditions.

Strategic Use of the “Bomber” Name:

One clever aspect of Countdown is how Genthru makes its activation phrase easy to say.

He intentionally spreads the alias “Bomber” around the island through his player-killing activities, ensuring that other players will talk about and recognize the name.

This makes it far more natural to say “Bomber” in conversation or in fear while he is touching them, making the first activation condition easier to fulfill.

Once he has also explained the rules to them, the bomb activates—often without the victim fully realizing it.

Release

Japanese name in the original work: “Release.”

Type: A joint activation method tied to Countdown, requiring Genthru, Sub, and Bara to cooperate.

Function:

Release is a special trigger that forcibly detonates all active Countdown bombs at once.

To use it, Genthru, Sub, and Bara press their right thumbs together and say the word “Release.”

To outsiders, Genthru presents Release as a disarming command that will remove the bombs.

He uses this deception to trick the Trick Group into gathering their specified cards and then schedules a “bomb removal ceremony” that, in reality, is a mass execution.

During that ceremony, when the trio performs Release, all the bombs detonate simultaneously, killing nearly everyone.

Genthru mockingly calls it a “release from fear,” turning the promise of salvation into a final cruel joke.

Importantly, the existence of Release is not part of the ability explanation Genthru gives to his victims.

It is a hidden function, meaning the victims have no reason to suspect that a supposed解除 ritual will actually kill them.

Criticism of Little Flower

Among fans, Little Flower is often criticized or questioned.

Two main points are frequently raised:

1. “Wouldn’t a regular aura punch be stronger?”

Because Genthru must protect his hand with very strong aura to survive his own explosion, some argue he could simply punch with that same aura for greater impact.

Earlier explanations in Hunter × Hunter suggest that concentrating aura into a punch (like with “Ko” and “Ken”) significantly amplifies physical attack power.

By this logic, an aura punch that can withstand a Little Flower explosion should itself be extremely strong, possibly stronger than the explosion.

This leads some fans to argue that Little Flower is inefficient or even redundant at high levels of aura use.

2. “Why not always use Countdown instead?”

To use Little Flower, Genthru must touch the opponent—a condition that is also sufficient to start setting up Countdown.

Since Countdown is almost guaranteed to kill once activated and has an immediate detonation option via Release, some fans feel Little Flower is obsolete in serious fights.

From that perspective, using a smaller, close-range explosion instead of a near-certain kill condition appears suboptimal.

This fuels the perception that Little Flower is a flawed or “subpar” ability.

Counterarguments and Tactical Justifications

In-universe, however, there are several reasons why Little Flower is still valuable and not just a “bad skill.”

First, Genthru’s overarching plan depends on the secrecy of Countdown.

He needs the name “Bomber” to spread as a rumor, but he cannot allow the details of Countdown’s conditions and解除 method to leak widely or his entire long-term con would fail.

If he carelessly uses Countdown in every fight, survivors could reveal its mechanics, making future targets cautious and harder to trick.

Little Flower, on the other hand, is a straightforward combat ability that does not reveal his hidden rules.

Second, Little Flower provides immediate, visible threat in close combat.

If someone tries to get close to touch Genthru to解除 Countdown, the knowledge that being grabbed can literally blow off a limb adds tremendous psychological pressure.

This fear can make opponents more hesitant, which in turn raises their heart rate and accelerates Countdown’s timer.

Thus, Little Flower and Countdown synergize psychologically: one threatens their body, the other quietly ticks toward their death.

Third, combat is not decided by a single punch between equals.

In realistic Nen battles, there are feints, grapples, exchanges, and positional advantages, where having multiple attack options (punches plus explosions) is always better than having only one.

Little Flower can be activated from unusual motions, not just standard striking forms, making it harder to predict.

Genthru can, for instance, engage in a grapple and then increase aura in his hand to trigger an explosion after a delay.

Additionally, while reinforcing his hands constantly is costly, it removes the tell that he’s about to use Little Flower.

This makes it harder for the opponent to distinguish between a simple grab and a lethal explosion, complicating their defense.

From this perspective, Little Flower is a strong supporting ability for Genthru’s overall strategy.

Even if it is not the single most aura-efficient way to deal damage, it expands his tactical repertoire and synergizes with Countdown’s psychological terror.

Overall Assessment

Genthru’s Nen design is highly specialized and extremely lethal.

Unlike many Hunters whose skills serve multiple roles such as capture, investigation, or defense, his powers are overwhelmingly oriented around killing opponents outright.

This makes him stand out even in a battle-heavy series like Hunter × Hunter.

Within the narrative, he represents a Nen user who has intentionally focused almost all of his creativity and training on “how to murder people more efficiently,” which is considered abnormal even by other Nen users.

His combination of Little Flower, Countdown, and Release, along with his joint Nen coordination with Sub and Bara, forms a deceptively simple but brutally efficient toolkit.

He is dangerous not only because of his raw power, but also because of his willingness to deceive, betray, and massacre on a large scale for the sake of his goals.

Sub and Bara

Sub and Bara are Genthru’s only true comrades.

They are his partners in the joint Nen ability Countdown and in the execution of Release.

Unlike his purely instrumental attitude toward the Trick Group, Genthru shows clear emotional investment in Sub and Bara.

He insists that they face risks together, even when there is no practical advantage to doing so.

When planning a trap that could potentially kill Sub and Bara, Genthru chooses to also roll the “Risky Dice” item himself, purely to share the danger.

This act demonstrates a form of twisted solidarity: when things get “interesting,” he wants all three of them on the same line between life and death.

After his defeat, his strongest request is that Bara be healed with the “Breath of Archangel” card.

This concern for his ally’s life provides a rare glimpse of genuine affection in an otherwise profoundly ruthless character.

The Trick Group

The Trick Group is a large collective founded to monopolize spell cards and seize specified cards from other players.

Genthru is one of the initial ten members at its founding and spends five years acting as part of its core.

To them, he appears as a reliable teammate and problem-solver.

He helps with recruitment, strategy, and morale, even giving speeches about their progress toward game completion.

But for Genthru, the Trick Group is never more than a means to an end.

He deliberately withholds his identity as the Bomber and hides his player-killing activities from them.

After five years together—more than enough time to form real bonds for most people—he reveals the truth and murders almost all of them without remorse.

He shows no visible emotional reaction even when told that someone he has worked with for half a decade, like Jispa, has died.

His relationship with the Trick Group illustrates the depth of his duplicity and his capacity for long-term, large-scale cruelty.

He is willing to invest years into a lie, then discard dozens of lives the moment they have served their purpose.

Opponents: Puhat, Tsezguerra, Gon, and Others

Genthru treats most opponents as either tools or obstacles.

With negotiators like Puhat, he uses them to demonstrate his own doctrine about psychological warfare, then kills them as examples.

With Tsezguerra, he adopts a more indirect, strategic approach.

He respects Tsezguerra enough to consider him a significant obstacle, but still believes he can outplay him and ultimately drives him out of the game.

His confrontation with Gon Freecss is unique because it is not just a clash of power but also of mental extremity.

Genthru expects others to be shocked by how “calmly insane” he is, but instead he finds himself unsettled by Gon’s willingness to sacrifice everything for a single punch.

This reversal—Genthru being psychologically overpowered by someone more extreme than himself—directly contributes to his defeat.

In that sense, Gon doesn’t just beat him physically; he also wins on the level of sheer, terrifying resolve.

Genthru embodies several notable themes in Hunter × Hunter:

Long-Term Deception:

He shows how Nen users can combine high intelligence and patience with lethal abilities to conduct years-long cons.

Hyper-Lethal Ability Design:

His powers are almost exclusively about killing, making him stand out among Nen users who usually value versatility or non-lethal utility.

Psychological Warfare:

He understands and exploits fear, trust, and despair, using demonstrations of cruelty (like sending severed heads) to control others.

Twisted Loyalty:

His genuine care for Sub and Bara contrasts sharply with his treatment of everyone else, showing that even monsters can have a small, selective moral circle.

Being Out-crazied:

His defeat by Gon highlights a core Hunter × Hunter idea: raw insanity, when combined with unwavering will and preparation, can overturn even a calculated, ruthless mastermind like Genthru.