Mei

Biodata

Feature	Details
Name	Mei (芽衣)
Alias(es)	Raiden Mei; Raiden Queen 76 461
Gender	Female 2
Affiliation	World Serpent 3 172
Occupation/Role	Voice actress for Raiden Mei; captain of the Third Squad 63 193
Status	Active; last depicted carrying the Flame-Chasers' legacy beyond the Elysian Realm 591
First Appearance	2

Power Progression

Stage / Realm / Level	Chapter	Notes
Third Herrscher awakening	41	Transforms during a battle aboard the Moonlight Throne, defeats a powerful Honkai Beast, then collapses from the strain.
Gem of Conquest reactivation	63	Retrieves the Gem of Conquest and channels lightning to confront Sirin-controlled Kiana; briefly reaches Kiana's consciousness but is defeated.
Raiden Queen manifestation	76	Assumes a horned form surrounded by purple-red lightning, publicly establishing the “Raiden Queen” persona.
True Herrscher of Thunder	170 171	Accepts the path of becoming the Herrscher of Thunder to slow Kiana's Honkai erosion. The Raiden Queen emerges to defeat Imaginary Husk: Nihilus before disappearing.
Authority of Conquest	330 445	Overwhelms the Herrscher of Domination's puppets and later grants Kiana the Lightning of Conquest for the final battle.
Flame-Chaser Signet integration	584	Uses the Signets of the Thirteen Flame-Chasers to summon their strength and recreate Elysia's final banquet.
Elysia's True Self's name	591	Receives Elysia's True Self's name, stated to become a new power for Mei in the future.

Background / History

Mei is first shown alongside Kiana and Bronya, maintaining a familiar, affectionate rapport with both of them. She playfully laments that Bronya no longer calls her “Mei-nee,” while Bronya uses hacked Destiny records to investigate an inspector. 2

She later appears with Kevin while wearing black-rimmed glasses and working with World Serpent. Her calm, intellectual presentation contrasts with Kiana's more impulsive behavior. 3

At Destiny's anime-production session, Mei is disturbed to learn that her assigned character is the Third Herrscher; her understanding of Herrschers is initially limited to destroyers of humanity. Kiana reassures her that she could become a Herrscher who fights for humanity instead. 36

Appearance

Mei's civilian image is associated with a gentle demeanor and black-rimmed glasses, while her Herrscher form is far more imposing and overtly supernatural. 3 76

• Black-rimmed glasses, giving her an “intellectual beauty” appearance. 3
• Long blue-purple hair reaching her waist in her animated depiction. 40
• A short black skirt and underskirt in her combat-oriented depiction. 40
• Dark-red horns and swirling purple-red lightning as the Raiden Queen. 76
• Purple-red Herrscher eyes when fully drawing on her power. 166

Personality

Mei is consistently gentle and considerate toward Kiana, though she is easily embarrassed by Kiana's public affection. She takes Kiana's welfare seriously, whether comforting her after setbacks or preparing food for her. 40 45 164

Her kindness does not prevent her from making difficult choices. After being unable to protect Kiana, Mei rejects passivity and becomes willing to enter danger, confront stronger opponents, and ultimately separate from Kiana to pursue a path she believes will save her. 105 170 172

Mei is also notably analytical. She identifies parallels between Divine Keys and Herrscher authorities, deduces the Herrscher of Domination's method of stealing authority, and exposes the Herrscher of Corruption's strategic weaknesses through observation rather than force alone. 19 306 548

Abilities & Skills

Herrscher of Thunder

Mei wields lightning-based Herrscher power, progressing from unstable awakenings to the fully realized Herrscher of Thunder.

• Defeated a powerful Honkai Beast during her initial Third Herrscher transformation. 41
• Channels blue-purple and red lightning through her body and weaponry. 76 166
• Forms lightning into close-range blades during her battle against Kiana. 172
• Annihilated the Herrscher of Domination's puppets with a single decisive strike. 330
• Can share the Lightning of Conquest with Kiana. 445
• Her early transformations caused severe exhaustion and unconsciousness. 41
• Lost to Raven while deprived of her Herrscher core before reawakening her power. 165 166

Swordsmanship

Mei is an accomplished katana user even when she deliberately avoids relying on Herrscher authority.

• Fought Rita despite the overwhelming difference in their combat strength. 105
• Used only her swords against the Theater of Domination's monsters to avoid surrendering her authority. 306
• Combined swordplay with lightning attacks against Kiana and the Herrscher of Domination. 172 330

Strategic Analysis

Mei regularly combines combat skill with rapid deduction.

• Connected Otto's transforming Divine Key and Kevin's weapon to different Herrscher authorities. 19
• Determined that the Herrscher of Domination needed willing access to her authority rather than being able to take it outright. 306
• Used Jackal's operations to open a spatial rift into the Theater of Domination. 317
• Realized that damaging the corrupted Elysian Realm could injure the Herrscher of Corruption itself. 548
• Identified that her visitor's mind, protected by the Authority of Conquest, could serve as a space immune to corruption. 552

Flame-Chaser Signets

During her journey through the Elysian Realm, Mei receives and employs the legacies of the Flame-Chasers.

• Receives Signets from Kalpas, Eden, and Su despite failing Kalpas's combat test. 470
• Obtains Griseo's Signet of Stars, granting access to the studio. 492
• Uses the assembled Signets to summon the deceased Flame-Chasers' strength in Elysia's final banquet. 584
• Inherits Elysia's True Self's name as a future source of power. 591

Equipment / Weapons / Items

• Katana — Mei's primary close-combat weapon. 105
• Gem of Conquest / Herrscher core — Source of her lightning authority before her full Herrscher awakening. 63 170
• Valkyrie armor — Previously contained a tracker, preventing Mei from safely returning to her team. 105
• Flame-Chaser Signets — Legacy powers gathered throughout the Elysian Realm. 470 492 584
• Purifying Thunder of Seven Sins — Given to Mei by Sakura to create an opening against the Herrscher of Corruption. 551
• Necklace — Left beside Anna's grave after Mei defeats Chen Tianwu. 204

Relationships

• Kiana Kaslana — Mei's partner and the person she is most determined to protect. Mei confesses her love, repeatedly risks herself to save Kiana, and joins World Serpent believing separation is the only way to keep Kiana alive. 62 170 172
• Kevin — World Serpent associate who presents Mei with the means to save Kiana and recruits her into the organization. Mei later questions him about the consequences of her choices. 170 172 204
• Raven — Begins as an opponent seeking to kill Kiana; Mei defeats her after reawakening her Herrscher power, and the two later become trusted mission partners. 166 306
• Bronya — Longtime friend who is concerned for Mei's safety and catches her after her first Herrscher transformation. 2 41
• Rita Rossweisse — Initially overwhelms Mei and forces her to flee, but later cooperates with her to locate Kiana and the Stigmata Project. 105 148
• Elysia — A Flame-Chaser whose Signet begins Mei's Elysian Realm journey. Their relationship develops from suspicion into mutual affection and an emotional farewell. 468 584 591
• Sakura — Ally in the battle against the Herrscher of Corruption; Sakura entrusts Mei with the Purifying Thunder of Seven Sins. 551
• Aponia — Initially warns that Mei's arrival will destroy Elysium and predicts Mei's death, but later intervenes to save her from Kalpas. 492 496

Story Role / Major Arcs

Third Herrscher Conflict

Mei reunites with Kiana aboard the Moonlight Throne and awakens as the Third Herrscher to protect her from a powerful Honkai Beast. She later retrieves the Gem of Conquest to confront Sirin-controlled Kiana, reaching Kiana emotionally even though she cannot win the fight. 41 63

Search for Kiana

After Kiana is taken away, Mei is defeated by Rita while trying to protect her. She refuses to abandon the search, confronts Raven, reawakens her lightning powers, and ultimately finds Kiana suffering from lethal Honkai erosion. 105 166

World Serpent

Kevin explains that Mei becoming the Herrscher of Thunder can temporarily slow Kiana's deterioration. Mei accepts World Serpent's offer, believing that fighting the Collapse from within the organization is the only way to protect Kiana in the long term. 170 172

Mei's decision culminates in a battle against Kiana. Although she gravely injures her, she cannot bring herself to treat their separation as anything but painful sacrifice. 172

Herrscher of Domination

Mei investigates the Theater of Domination with Raven, identifies the enemy's limitations, and enters its unstable spatial rift despite the risk. She later defeats the puppets while refusing to doubt Kiana's ability to survive. 306 317 330

Final Support for Kiana

Mei reconnects with Kiana in a consciousness-created white space. Rather than attempting to hold Kiana back, she recognizes Kiana's growth and gives her the Lightning of Conquest for the final battle. 445

Elysian Realm

Mei enters the Elysian Realm to uncover the Previous Era's legacy. She refuses Elysia's guided route, gathers Signets from the Flame-Chasers, challenges Aponia's prophecy, and investigates the realm's anomalies independently. 468 470 492 498

After Pardo's death and Vill-V's betrayal, Mei confronts the Herrscher of Corruption. She survives corruption, exposes the enemy's vulnerabilities, fights beside Sakura, and uses the Flame-Chasers' Signets to create Elysia's long-awaited final banquet. 535 548 551 584

Notable Quotes

“Kiana! I will never abandon you, just like you never abandoned me!” 63

“Let me walk into the darkness, in exchange for you returning to the light.” 171

“You are neither [Omniscient] nor [Invincible] – proving these two points is enough.” 548