Y/N defeats Gehan and seals Gehenna in the decisive confrontation that follows the awakening and integration of her divided supernatural nature. Trapped in a chained place beneath a blood-red moon, she joins her human self with the light and dark aspects of her identity, recovers the power associated with both sides, breaks Gehan’s control, and shuts the gates through which he could return. The event is both a physical victory and a reversal of authority: Gehan is the ruler of Gehenna, but Y/N becomes the one who can deny him access to the world.

Causes and Background

The confrontation is rooted in the revelation that Y/N’s power has been divided within her. A woman who appears during the crisis tells Y/N that she has come to help, while Y/N’s dark aspect explains that her side has fallen out of control because of what her father did. Y/N’s light aspect then insists that the three selves must work together and merge. The divided figures are not presented as unrelated beings; the dark aspect states that they are all the same person, with the integration allowing the human Y/N to possess her powers fully rather than merely endure them from the outside.

The supernatural conflict also has a specifically infernal dimension. Bambam identifies Gehan as the ruler of Gehenna itself, while Jinyoung clarifies that humans call it Hell. Gehan therefore is not simply another enemy in the succession of kidnappings, possessions, and imprisonments that have marked Y/N’s story. His authority is tied to a realm with its own gate, and his threat persists because he claims that, even if sent back, he can return. Sealing Gehenna is consequently necessary not only to defeat him in the immediate struggle but to prevent the conflict from repeating.

The Fusion of Y/N’s Selves

The integration begins as a deliberate act rather than an accidental change. Y/N, her light aspect, and her dark aspect hold hands in a triangle while the dark aspect tells the ordinary self to concentrate and let the divided powers complete the process. Y/N closes her eyes, and the scene shifts into a different atmosphere. When she opens them, she remains in the chained location, but Gehan is now directly in front of her with blue fire in his hands. The setting has not changed outwardly; the balance of power has.

Y/N describes the transformation as having involved a private conversation with herself, but its consequence is unmistakable. She feels much stronger, moves her right arm, and breaks the chain without needing an external rescuer. The gesture reverses the condition that had defined the earlier scene: the body once immobilized by another force now acts freely, and the restraint gives way at the movement of her own will. Gehan’s apparent fear makes the reversal visible. Y/N recognizes the irony that he is afraid of his own daughter, exposing a familial connection that makes his attempt to dominate her more intimate and more self-defeating.

The Battle with Gehan

Once free, Y/N tests the new power through telekinesis. She raises her arm and sends Gehan flying with the movement, then moves the arm repeatedly so that he crashes into multiple walls. The violence is not described as a prolonged exchange of equal attacks. Instead, the scene emphasizes control: Y/N directs the space around Gehan, while Gehan is reduced to an object acted upon by her gestures. Her amused response to the power marks a sharp tonal change from fear and confinement to discovery and command.

Gehan still asserts his status as Gehenna’s ruler and argues that he can return even if he is sent back. Y/N answers by changing the objective. She does not merely threaten to defeat him again; she declares that she will lock the gate to Hell. This promise identifies the structural weakness in Gehan’s claim to power. His title may make him ruler of Gehenna, but it does not guarantee unrestricted passage between realms once Y/N controls the threshold.

The Sealing of Gehenna

Y/N reaches into one of Gehan’s pockets and takes a glass ball from him, announcing that she will keep it. She then pushes him away, concentrates, and imagines the gates of Gehenna into existence. The summoning is accompanied by rumbling, and Gehan realizes that she is carrying out the threat he had dismissed. Y/N throws him through the gates, after which she locks them. The gate slowly disappears, turning the victory into a lasting closure rather than a temporary expulsion.

The glass object remains in Y/N’s hands after the gate vanishes. She senses something there, described as air, suggesting that the object or the power associated with it has changed function once Gehan is removed. The sequence gives the victory a ritual structure: Y/N claims an instrument from the ruler, calls forth the forbidden passage, casts its ruler back into his own domain, and closes the passage behind him. The action joins personal liberation to cosmological repair without presenting the two as separate accomplishments.

Consequences and Aftermath

The immediate aftermath introduces Y/N’s mother through the return of a blue bubble that grows larger and changes into human form. The figure is Y/N’s mother, who looks worried and asks whether the transformed person before her is really Y/N. Her appearance reconnects the supernatural confrontation to the family history that has shaped it. Y/N had earlier been abandoned by her mother after being left outside the car, and later found the same mother lying on the ground in a pool of blood. Against that history of absence and death, the mother’s reappearance after Gehan’s defeat makes the sealed gate part of a larger revelation about Y/N’s origins.

The victory does not erase the danger imposed on the other characters. Assiah later approaches Y/N and the vampires, insisting that she does not mean to harm Y/N. When RM asks what happened, Assiah explains that Y/N had been possessed by her own power. This interpretation reframes the battle: Y/N’s threat was not simply external domination by Gehan, because her uncontrolled power had also become a form of possession. Her fusion therefore resolves an internal division as well as defeating an external ruler.

The curse surrounding Gehan’s influence extends to the others. Bambam is shown with a hole through his chest, suffered while trying to stop Y/N, and Assiah reveals the mark of Gehan on his wrist. She says that all of them have been under the curse for too long and begins concentrating on the energy flowing through the mark. The aftermath thus widens the meaning of Y/N’s victory. Closing Gehenna removes Gehan’s route of return, but the damage, possession, and marks left by his rule still require healing.

Narrative Significance

This event completes a movement from enforced separation to chosen integration. Y/N’s history repeatedly places her in thresholds she does not control: her mother abandons her beside the road, J-Hope finds her after she runs away, a shadow pulls her through a mirror, and Jackson briefly seizes her from behind while she is trying to escape. In the Gehenna confrontation, that pattern is reversed. Y/N crosses no threshold because an enemy drags her through it; she creates the gate herself, determines who passes through it, and makes it disappear.

The event also converts inherited identity into active agency. Gehan is revealed as Y/N’s father and the ruler of Gehenna, while her light and dark aspects disclose a divided origin connected to what he did. Yet Y/N’s final action does not make her subordinate to either the infernal inheritance or the supposedly purer light. She merges the aspects, retains the powers of both, breaks the chain, and uses them according to her own decision. The decisive transformation is therefore not merely that Y/N becomes stronger. It is that the forces that once defined her as a vessel, a captive, or a possessed body become instruments under her control.

As a climax, the sealing of Gehenna combines recognition, combat, and closure. Y/N learns enough about her divided self to act, defeats Gehan through a visible exercise of telekinetic power, and resolves the larger threat by closing the realm’s gate. The slowly disappearing gate gives the ending a deliberate final image: the passage through which domination could recur is withdrawn from the world, even though the survivors must still confront the curse’s remaining consequences.