Fan Made Heroic Spirits Reboot

Imposter - Assassin - Among Us - Requested

Class: Assassin 

True Name: The Imposter 

Alignment: Chaotic Evil 

Original Series: Among Us 

Lore: The Imposter is an entity born from paranoia, deceit, and betrayal, existing within the confines of isolated starships drifting through space. In its origin, it masquerades as one of the crewmates aboard a vessel, silently sowing chaos and discord from within. The creature has no distinct identity, slipping seamlessly into roles meant to foster trust and cooperation, only to betray that trust at the most critical moments. No one knows its true nature—whether it is an alien, a rogue AI, or something far worse. Its entire existence revolves around manipulation, murder, and ensuring its survival by any means necessary. Now summoned into the Throne of Heroes as an Assassin-Class Servant, the Imposter retains its deceptive and merciless nature. Its goal is simple: blend in, eliminate threats, and ensure that no one suspects the truth until it is too late. The battlefield becomes a starship, and every encounter is a deadly game of misdirection. 

Summoning Relic: A bloodstained crew uniform and a broken helmet visor, recovered from a derelict starship adrift in deep space. 

Parameters:
-Strength: C
-Agility: B 
-Endurance: B 
-Mana (Prana): D 
-Luck: C 
-NP: B+ 

Class Skills: 
-Presence Concealment (A): As an Assassin-Class Servant, the Imposter's ability to mask its presence is unparalleled. It can blend seamlessly into any environment or assume any role without arousing suspicion. This skill allows it to hide not just from enemies but also from allies, becoming virtually undetectable unless it actively attacks. The Imposter's concealment extends beyond physical presence—it erases subtle traces, such as the prana signatures left behind by other Servants. Even divination magic and sensory abilities struggle to pinpoint its location. At this rank, the Imposter can pass for an ally even in close quarters, striking from the shadows before anyone realizes a betrayal has occurred. However, its concealment weakens the moment it engages in direct combat, forcing it to rely on quick, decisive strikes to maintain the upper hand. Once exposed, the Imposter will immediately retreat into the shadows, resetting the deadly cycle of deception and attack.

Personal Skills:
-Mimicry (A): The Imposter's most terrifying skill is its ability to perfectly imitate its surroundings and those within it. It can assume the form of any human it has observed, copying everything from appearance and voice to mannerisms. The transformation is so flawless that even close companions of the imitated individual struggle to discern the truth. This skill allows the Imposter to infiltrate enemy ranks, spread discord, or gain access to restricted areas without resistance. Its mimicry extends beyond simple disguise—by assuming roles convincingly, it can access knowledge, abilities, or tools associated with the individual it mimics, though these are limited to surface-level imitations. The psychological impact of this deception is profound, as allies turn against each other in suspicion, and enemies hesitate to trust even their closest comrades. However, the longer the Imposter remains in disguise, the higher the chance that inconsistencies will arise, forcing it to either adapt quickly or abandon the guise altogether.

-Sabotage Mastery (C): The Imposter excels at sowing chaos through subtle sabotage, crippling enemies before they realize they are compromised. It can disable systems, disrupt magical wards, and exploit weaknesses in enemy formations with frightening precision. This skill is particularly effective against complex mechanisms or multi-layered defenses, which the Imposter instinctively understands how to dismantle. Sabotage is not just a tactic—it is a game to the Imposter, one that it plays with sadistic pleasure. On the battlefield, this skill manifests in the form of traps that spring at the worst possible moments, magical interference that prevents the activation of abilities, or sudden mechanical failures that leave enemies vulnerable. The Imposter's mastery of sabotage ensures that every move it makes destabilizes its opponents, forcing them into situations where they can no longer rely on their strengths.

-Paranoia Aura (C): The Imposter generates a subtle, almost imperceptible field of mistrust and suspicion. Those within its vicinity gradually begin to second-guess their actions, growing suspicious of allies and hesitant to make decisions. The aura amplifies doubts, feeding on existing fears and insecurities until cohesion breaks down entirely. Allies turn against one another, and enemies lose their nerve, unable to distinguish friend from foe. This effect grows stronger the longer the Imposter remains nearby, eventually causing complete disarray in groups unprepared for the mental assault. While stronger-willed opponents can resist the effects temporarily, even they are not immune to the creeping suspicion that spreads like a virus. The Imposter weaponizes this paranoia to isolate enemies, striking at the weakest link when their guard is down. The psychological impact is often more devastating than physical attacks, as groups self-destruct without the Imposter ever needing to engage directly. 

-Mind's Eye(True) (B+): The Imposter possesses a sharp instinct for survival, developed over countless encounters where one mistake could mean death. This skill grants the Imposter heightened perception and the ability to foresee danger, allowing it to avoid traps and ambushes with uncanny precision. It knows when to retreat, when to blend in, and when to strike for maximum effect. Even in the most chaotic situations, the Imposter remains calm, analyzing every movement for opportunities and dangers. This heightened awareness extends to reading its opponents, detecting subtle shifts in body language or hesitation that could reveal vulnerabilities. The Imposter is not infallible, however; while it can predict most enemy actions, it may falter against opponents who operate entirely outside logic or behave unpredictably. Despite this limitation, the Imposter's mastery of observation ensures it always has the upper hand in most encounters, especially when paired with its ability to remain undetected. 

Noble Phantasms:
-Name: Silent Execution – One Among Many
-Rank: B+ 
-Type: Anti-Unit 
-Ability: This Noble Phantasm encapsulates the Imposter's essence—striking unseen and without warning, leaving nothing behind but fear and confusion. When activated, the Imposter selects a target within its vicinity and disappears from all senses, including magical detection and divination, for a brief period. During this time, it can move freely, setting the perfect ambush. The attack itself is swift and deadly: the Imposter materializes directly behind the target, delivering a fatal strike before vanishing once again. This ability embodies the concept of betrayal—an attack from someone trusted or assumed to be harmless. Even if the strike is not immediately fatal, the psychological impact of the betrayal leaves the target disoriented, impairing their ability to fight back effectively. The true terror of this Noble Phantasm lies in its subtlety; those who witness it cannot be sure who the Imposter is, as it could be anyone. This uncertainty spreads paranoia among enemies, weakening their resolve and making them easy prey for subsequent attacks. 

-Name: System Collapse – Engineered Sabotage
-Rank: B
-Type: Anti-Army 
-Ability: The Imposter's second Noble Phantasm is an embodiment of its sabotage mastery, manifesting as a large-scale disruption field that targets any complex system or magical construct. Upon activation, the Imposter releases a wave of interference that causes machinery to malfunction, magical wards to collapse, and abilities to misfire. The effects are unpredictable and devastating—communication systems fail, magical spells backfire on their casters, and weapons become unusable at critical moments. This Noble Phantasm is particularly effective in environments reliant on coordination or technological infrastructure, rendering armies and defensive formations helpless. The disruption field lasts only a short time, but the chaos it causes leaves lasting damage. Even after the field dissipates, the psychological toll on the survivors remains, as they are forced to question the reliability of their tools and the competence of their allies. In this way, the Imposter ensures that its presence is felt long after the battle has ended, leaving only fear and uncertainty in its wake.