Acheron (Honkai: Star Rail)

Articles about Raiden Mei	Honkai Impact 3rd • Honkai: Star Rail

• Base
• With Unsheathed Sword

“	I, too, was once kept in someone's heart like you. Those trivial moments, when looked back upon, are worth more than a thousand words... The past shapes who we are today. Some things are hard to remember, others hard to forget.	„
	~ Acheron talking about Trailblazer

Credits to XiangYu香芋

“	Set forth on your voyage without hesitation, Nameless, on the Path of the Trailblaze. Even if the ending has been predetermined, that's fine. There are countless things that humans cannot change. But before that, on the road towards the end, there are still many things that we can do. And because of this, the "end" will thus reveal a completely different meaning. This is the meaning of "journey." All those things, beautiful before, are still so now. And I believe... It will still bloom at the end of the Nihility, until we meet again beneath the sun's rays.	„
	~ Acheron to Trailblazer

Summary

Raiden Bosenmori Mei (雷電忘川守らいでんぼうせんもり芽衣めい), more commonly known as "Acheron", is a drifter claiming to be a Galaxy Ranger. She walks the cosmos alone, carrying with her a long sword.

Though aloof and taciturn, her blade flicks out like lashing lightning. And yet, she always strikes with her scabbard, never drawing the sword free.

Powers and Stats

Tier: 3-B, 1-B with Unsheathed Sword and Path of Nihility

Name: Acheron, Raiden Bosenmori Mei (True name)

Titles: Acheron the Watcher

Origin: Honkai: Star Rail

Gender: Female

Age: Unknown

Classification: Former-Human, Oni, Galaxy Ranger (Self-Proclaimed), Emanator of Nihility, Self-Annihilator

Powers and Abilities:

• Abilities
• Resistances

• Superhuman Physical Characteristics

• Extrasensory Perception (Enhanced Sight) & Enhanced Senses
  • (Neutral Vision & Soul Vision; Can see souls)

• Immortality:
  • Type 2 (Mid; Self-Annihilators can survive having their heads shattered into pieces and ripped off from their bodies for long periods of time, being able to talk normally during these situations that would have instantly killed a normal human as if they never happened)
  • Type 3 & Regeneration (Mid; Self-Annihilators can regenerate their heads from being smashed into pieces and reattach them back to their original positions)

• Master Swordswoman

• Electricity Manipulation (All of her attacks deal lightning damage)

• Danmaku & Energy Projection (Acheron can fire multiple slashes of energy made of electricity)

• Martial Arts & Acrobatics (Hypermobility; Despite mainly being a swordswoman, Acheron is also proficient in Martial Arts and Acrobatics as she incorporates them into battle together with her swordswomanship)

• Stealth Mastery (Using "White"Bated Breath, Acheron can conceal herself and others near her)

• Non-Physical Interaction
  • (Spiritual, Mental, Information【Type 2】& Concept【Type 1】; Can interact with souls)
  • (Energy; Can interact with a Stellaron which is composed of pure energy. Should be able to interact with a Heliobus like the Trailblazer)
  • (Memories; Should be able to interact with memories like the MC and Fu Xuan)
  • (Data; Can interact with a Stellaron made out of data and Aether Spirit which are also composed of data)
  • (Elemental; Acheron can interact with Duke Inferno who is a being made out of flames)
  • (Abstractions【Type 2】, Concept【Type 3〈Vision, Sight & Death〉】; Can affect Allseer, which embodies the concepts of vision and sight as well as Something Unto Death, which is a sort of figurative amalgam of complex concepts, which for now is known as death)

• Limited Madness Manipulation (Type 3; Can traumatize those who attempt to look into her mind)

• Acausality (Type 2; Acheron does not show up in Elio's script even though he can see an infinite amount of possible futures and she has no past as the Nihility erased it. When one walks on the Paths formed by Aeons, their various possibilities will eventually collapse into a single one, as fate are weaved under their radiance)

• Imaginary Energy (Nihility; As an Emanator of Nihility, Acheron is capable of drawing Imaginary Energy from Paths which is a part of imaginary element, with the imaginary space being both the metaphysical world and a higher-dimensional plane. Emanators were directly bestowed power and blessed by their respective Aeons, gaining abilities and resistances related to the Aeon they follow)

• Dimensional Travel (Emanators can travel through imaginary spaces and the boundary between worlds)

• Passive Probability Manipulation (When one walks on a Path their various possibilities collapses into a single entity)

• Transformation & Statistics Amplification (When Acheron unsheathes her sword to reveal her true powers as an Emanator of Nihility, she undergoes a transformation that increases all of her capabilities drastically and gains a plethora of abilities)
  • Enhanced Non-Physical Interaction (Abstractions【Type 1】, Concept【Type 1】& Nonexistence【Natures Types 2 & 3, All Aspects】; Acheron can interact with a manifestation of IX)
  • Durability Negation (Spatial; While transformed, all of Acheron's attacks negate the conventional durability, since her sword can cut through dimensions and spacetimes)
  • Space-Time Manipulation (Drawing her sword causes space and time to instantly freeze)
  • Fate Manipulation (Acheron can sever fate itself with her blade)
  • Pocket Reality Manipulation, BFR (Dimensional) & Black Hole Creation (Acheron can send people to the "Horizon of Existence", often referred to as the Border of Nihility, an endless domain that stands between the boundary of nonexistence under IX's shadow, where there is one of the thousands of IX's manifestations and time is frozen. Those who end up at the Horizon will irreversibly move towards the Border with no possibility of escape)
  • Void Manipulation, Existence Erasure (Space-Time, History, Memory, Information【Type 2】& Conceptual【Type 1】) & Causality Manipulation (Anything venturing into IX will leave nothing behind not even the trace of past and future, as THEY opposed the very concept of existence as Nihility. As an Emanator of Nihility, Acheron has walked the Path of Nihility farthest among the Pathstriders of the same Path, being able to deny anything to 'Nihility' of the absolute void, making the enemies and objects vanish from the existence along of their meaning as if they never existed, with Black Swan claiming that Acheron can cut off cause and effect as she did to the history of Izumo and Takama, erasing it to the point that even the Path of Remembrance cannot recall it. A person's soul is regarded as their mind and is composed of fundamental information, the latter that shapes reality and life as a line of code, being conceptual in nature)
  • Power Nullification, Resistance Negation & Statistics Reduction (Acheron can slice through Xipe's curses and Ena's dreams, and was even able to cut through the Path of Preservation itself. After unleashing her true power, her attacks can ignore the opponent's Elemental Resistance to Fire, Ice, Lightning, Air, Quantum and Imaginary Energy)

• Imaginary Energy (Emanators are resistant to Imaginary Energy because, as seen when Acheron's passive Imaginary Energy was unleashed against Aventurine of Stratagems after she unsheathed her sword yet failed to affect him, their metaphysical anchorings—such as Aventurine's Cornerstone, which contains a share of the power of Diamond, an Emanator of Preservation—and Acheron's alignment with the Path of Nihility as an Emanator of Nihility render them inherently resistant to the effects of Imaginary Energy)

• Antimatter Manipulation (Can resist the effects from Reavers whose bodies are completely made out of antimatter)

• Biological Manipulation, Corrosion Inducement, Space-Time Manipulation & Reality Warping (Can withstand several effects caused by the Fragmentum)

• Void Manipulation, Existence Erasure (Space-Time, History, Memory & Information【Type 2】& Conceptual【Type 1】), Memory Manipulation & Causality Manipulation (Emanators like her should be unaffected by imaginary space which erases all trace of existence and can cause people to forget themselves. Acheron was able to resist the effects of being swallowed by the shadow of IX the Nihility)

• Aura (Overwhelming & Explosive), Madness Manipulation (Types 2 & 3), Empathic Manipulation, Sleep Manipulation, Soul Manipulation, Mind Manipulation, Information Manipulation (Type 2) & Conceptual Manipulation (Type 1; To become an Emanator of Nihility, Acheron should have been able to resist being in the presence of IX, which can shatter the minds of their opponents and manipulate their emotions, causing sentient beings that have contact with IX to become insane and had their souls drained passively, often resulting in their incapacitation. IX's presence can also put their opponents to sleep)

• Dream Manipulation (Acheron was unaffected by Ena's dream. Because of the Nihility, Acheron is rarely affected by the power of other Paths)

• Law Manipulation (The Path of Order can't affect the Nihility. The power of other Paths rarely affects Acheron because of the Nihility)

• Curse Manipulation, Mind Manipulation, Soul Manipulation, Information Manipulation (Type 2), Conceptual Manipulation (Type 1), Illusion Creation & Sound Manipulation (Emanators are able to effortlessly dispel Sunday's Harmony powers with just their subconscious minds)

• Status Effect Inducement (Which in-game is represented as Burning, Freezing, Electric Shock, Sharp Winds, Quantum Entanglement & Imaginary Imprisonment)

Unconventional Resistances

• Soul Manipulation, Mind Manipulation & Information Manipulation (Type 2; The soul contains the consciousness and fundamental information, the latter that shapes up all of reality and life)

Attack Potency: Multi-Galaxy level (As an Emanator of Nihility and a Self-Annihilator, Acheron is vastly stronger than regular Pathstriders and mere mortals. As a fully-fledged Emanator recognized by the Aeon of Nihility, Acheron should be comparable to other Emanators, since it has been stated that defeating an Emanator requires power on the same level, making her at least ten times stronger than Aventurine of Stratagems. Was able to fight against the illusion-like clones of Silver Wolf, Blade and Kafka in a 1v3 battle, even being capable of emerging as the winner of the combat by soundly defeating them. While holding back, she fought evenly with SAM), Hyperverse level with Unsheathed Sword and Path of Nihility (After unsheathing her sword, Acheron undergoes a transformation which unleashes her full power as an Emanator of Nihility, making her vastly stronger than before. With a single attack, she one-shotted a weakened Aventurine of Stratagems and obliterated his strongest attack which was infused with the full power of the Path of Preservation. Furthermore, Welt considers her power terrifying, and stated it can affect the entire Dreamscape. Managed to undo Dominicus' Harmony and Order powers through the entirety of Dreamscape, with it being stated that in order to overcome Harmonious Choir's power, the same level of power as him would be needed. Emanators can draw power from their respective Aeons, tapping into 12-D levels of strength. For example, the Lord Ravager Irontomb is capable of killing the Aeon of Erudition Nous, as well as destroying the entire universe from drawing power from the Aeon of Destruction Nanook. Acheron can draw power from the Aeon of Nihility IX to transform, and it is eventually implied that she is also capable of killing IX. She can also destroy manifestations of IX THEMSELF as shown in her ultimate and backstory)

Speed: Immeasurable (Casually kept up with the illusion-like clones of Silver Wolf, Blade and Kafka in a 1v3 battle, effortlessly dodging their attacks, and then proceeded to blitz them. Kept pace with SAM. Was able to watch and keep track of the entire fight between Trailblazer, March 7th, Himeko and Welt against a weakened Aventurine of Stratagems), higher with Unsheathed Sword (Far faster than before. Should be at least comparable to Dominicus)

Lifting Strength: Class Y (As an Emanator of Nihility and a Self-Annihilator, Acheron should be comparable to Jing Yuan, an Emanator of Hunt), higher with Unsheathed Sword (Far stronger than before. Should be at least comparable to Dominicus)

Striking Strength: Multi-Galaxy level (Easily stopped a simultaneous attack from the illusion-like clones of Silver Wolf, Blade and Kafka, and then proceeded to overpower them. While holding back, she matched SAM), Hyperverse level with Unsheathed Sword

Durability: Multi-Galaxy level (It was stated that in order to defeat an Emanator, the same level of power as one is needed. Blocked several attacks from the illusion-like clones of Silver Wolf, Kafka and Blade with ease. While holding back, she was able to withstand and block multiple attacks from SAM), Hyperverse level with Unsheathed Sword (Vastly more durable than before. As a physical fighter, she can withstand the force of her own physical attacks)

Stamina: Superhuman (Acheron endured countless battles against the Yaoyorozu-no-Kami and its most powerful subordinates over many years with minimal rest, including a grueling and prolonged fight against Hakuhatsu Ki, the wielder of the sword End, ultimately emerging victorious. Even after these exhausting trials, she withstood being consumed by the shadow of IX, the Aeon of Nihility. Despite this overwhelming ordeal, she gathered the strength to unleash a powerful slash against IX and successfully escaped from the Aeon of Nihility)

Range: Extended Melee Range with Scabbard and Unsheathed Sword, Tens of Meters with Scabbard's Energy Projection, at least Galactic, likely Intergalactic & Interdimensional with Unsheathed Sword's Powers and Abilities (A single casual energy slash from Acheron easily extended beyond the Clock Studios Theme Park, destroying Aventurine of Stratagems' strongest attack that was covering said park. Her true powers as an Emanator of Nihility were stated to be capable of affecting the entirety of Dreamscape, a realm based on everything regarding the Asdana Galaxy, including its immense size, which spans at least millions of light-years. She unleashed a powerful energy slash that reached IX despite the Aeon of Nihility being at a distance comparable to that between a sun and a planet. After unsheathing her sword, Acheron gains the ability to send her opponents to the "Horizon of Existence". Was able to nullify Ena's dream throughout the entire Dreamscape despite being on the "Horizon of Existence"), Hyperversal with Imaginary Energy and Dimensional Travel (Emanators can draw powers from their respective Aeons, who are Higher-Dimensional beings and congregations of Imaginary Energy. Emanators are capable of traveling through imaginary spaces and the boundary between worlds)

Standard Equipment:

• Equipment
• Light Cones

A sword named Naught.

Along the Passing Shore (流りゅう逝せい岸がん歩ぽ, Ryūseiganpo): Increases the wearer's critical damage by 60%. When the wearer hits an enemy target, inflicts Mirage Fizzle on the enemy, lasting for 1 turn. Each time the wearer attacks, this effect can only trigger 1 time on each target. The wearer deals 40% increased damage to targets afflicted with Mirage Fizzle, and the damage dealt by the wearer's Ultimate additionally increases by 40%.

Along the Passing Shore

Intelligence: Above Average generally, Genius combatant (Acheron saw through Black Swan's true intentions while dancing with her, and as retaliation, she manifested her memories upon her, inducing palpitating revelation and psycho trauma. She instantly noticed Black Swan's identity upon interacting her and asked about the Annihilation Gang. Acheron is highly proficient with the sword being able to fight using only the scabbard itself. She has sharpened her skills with her katana by fighting for many years against the Yaoyorozu-no-Kami. She can also evenly match and eventually defeat the illusion-like clones of Blade and Kafka, both of whom are swordmasters)

Weaknesses: Acheron is hesitant to draw her blade unless she deems it necessary. As a Self-Annihilator, Acheron will gradually lose her senses and memories.

Notable Attacks/Techniques:

Skills Traces Eidolon Trilateral Wiltcross (三さん途づ枯これ木き, Sanzu Koreki): Deals lightning damage equal to 130% of Acheron's attack to a single enemy. Octobolt Flash (八雷渡はちらいわた飛ひ, Hachirai Watahi): Gains 1 point(s) of Slashed Dream. Inflicts 1 stack(s) of Crimson Knot on a single target enemy, dealing Lightning damage equal to 176% of Acheron's attack to this target, as well as Lightning damage equal to 66% of Acheron's attack to adjacent targets. Slashed Dream Cries in Red (残ざん夢染むそ繚りょう乱一らんひと太刀たち, Zanmuso Ryōran Hitotachi): Acheron's Ultimate. Sequentially unleash Rainblade 3 times and Stygian Resurge 1 time, dealing Lightning damage up to 401.8% of Acheron's attack to a single target enemy, as well as Lightning damage up to 324% of Acheron's attack to other targets. Rainblade (啼沢ていたく斬ぎり, Teitaku-giri): Deals Lightning damage equal to 25.9% of Acheron's attack to a single target enemy and removes up to 3 stacks of Crimson Knot from the target. When Crimson Knot is removed, immediately deals Lightning damage equal to 16.2% of Acheron's attack to all enemies. For every stack of Crimson Knot removed, the damage Multiplier for this is additionally increased, up to a maximum of 65%. Stygian Resurge (黄泉返こうせんかえり, Kōsen-kaeri): Deals Lightning damage equal to 130% of Acheron's attack to all enemies and removes all Crimson Knots. Crimson Knot cannot be applied to enemies during the Ultimate. Trilateral Wiltcross Octobolt Flash Slashed Dream Cries in Red Talent Atop Rainleaf Hangs Oneness (紅葉こうよう時雨しぐれ・万ばん里り一空いっくう, Kōyō Shigure - Banri Ikkū): When Slashed Dream reaches 9 point(s), the Ultimate can be activated. During the Ultimate, reduces enemies' Toughness regardless of Weakness Types and reduces all enemies' All-Type resistance by 22%, lasting until the end of the Ultimate. When any unit inflicts debuffs on an enemy target while using their ability, Acheron gains 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on the target. If debuffs are inflicted on multiple targets, then the 1 stack of Crimson Knot will be inflicted on the enemy target with the most Crimson Knot stacks. This effect can only trigger once per every ability usage. After an enemy target exits the field or gets defeated by any unit while Acheron is on the field, their Crimson Knot stacks will be transferred to the enemy target with the most Crimson Knot stacks on the whole field. Technique Quadrivalent Ascendance (四し相斷そうだん我が, Shisō Danga): Immediately attacks the enemy. At the start of each wave, gains Quadrivalent Ascendance, dealing Lightning damage equal to 200% of Acheron's attack to all enemies and reducing the Toughness of all enemies irrespective of Weakness Types. When Weakness is broken, triggers the Lightning Weakness Break effect. After using the Ultimate, Acheron gains 1 point(s) of Slashed Dream and inflicts 1 stack(s) of Crimson Knot on a single random enemy. If attacking a normal enemy, immediately defeats them without entering combat. When not hitting any enemies, no Technique Points are consumed. Quadrivalent Ascendance Red Oni (赤鬼あかおに, Aka oni): When the battle starts, immediately gains 5 point(s) of Slashed Dream and applies 5 stack(s) of Crimson Knot to a random enemy. When Slashed Dream reaches its upper limit, for every point of Slashed Dream that exceeds the limit, gains 1 stack of Quadrivalent Ascendance. Increases the maximum stackable count for Quadrivalent Ascendance to 3. The Abyss (奈落ならく, Naraku): When there are 1 or 2 Nihility characters other than Acheron in the team, the damage dealt by Acheron's Basic attack, Skill, and Ultimate increases to 115% or 160% of the original damage respectively. Thunder Core (雷心らいしん, Raishin): When the Rainblade from Acheron's Ultimate hits enemy targets with Crimson Knot, her damage increases by 30%, stacking up to 3 time(s) and lasting for 3 turn(s). And when Stygian Resurge triggers, additionally deals damage for 6 times. Each time deals Lightning damage equal to 25% of Acheron's attack to a single random enemy is viewed as part of the Ultimate damage. Silenced Sky Spake Sooth (高天こうてん寥りょう落らく・真言しんごん始し, Kōten Ryōraku - Shingonshi): Critical rate increases by 18% when dealing damage to debuffed enemies. Mute Thunder in Still Tempest (雷霆静らいていせい・秋風あきかぜ止やむ, Raiteisei - Akikaze Yamu): The number of Nihility characters required for the Trace "The Abyss" to achieve its highest possible effect is reduced by 1. When this unit's turn starts, gains 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on the enemy with the most Crimson Knot stacks. Shrined Fire for Mirrored Soul (鏡中照きょうちゅうしょう永焔えいえん, Kyōchūshō Eien): When enemy targets enter combat, makes them Vulnerable to the Ultimate damage, increasing the amount of damage they take from the Ultimate by 8%. Apocalypse, the Emancipator (束縛解災そくばくかいさい, Sokubaku Kaisai): Increases the All-Type RES PEN for the Ultimate damage dealt by Acheron by 20%. The damage dealt by Basic attack and Skill will also be considered as Ultimate damage and can reduce enemy toughness regardless of Weakness Types. When Weakness is broken, triggers the Lightning Weakness Break effect.

Notable Matchups

Victories:

• Kai (Ninjago) Kai's Profile (Pilots-Season 16 Kai was used and had access to his Vengestone gun; Battle took place in a jungle; Starting distance was 5 meters; Speed was equalized)

• Son Goku (Dragon Ball Super) Son Goku's Profile ("Super Hero Arc" Goku was used and Acheron had access to her Unsheathed Sword; Battle took place in a empty New York City; Starting distance was 5 meters; Speed was equalized)

• Raiden Mei (Honkai Impact 3rd) Mei's Profile (Herrscher of Origin Mei and Acheron with Unsheated Sword were used; Speed was equalized)

• Zephyro (Honkai: Star Rail) Zephyro's Profile (Acheron starts off in Base. Speed was unequalized)

Losses:

Inconclusive:

Discussions

Discussion threads involving Acheron (Honkai: Star Rail)