Raiden Mei

Biodata

Feature	Value
Name	Raiden Mei
Alias(es)	Queen of Raiden; Third Herrscher; Herrscher of Thunder; “Sword Princess” 16 91 128
Species/Race	Human; host of the Conquest Gem and the Herrscher of Thunder 36 128
Gender	Female
Affiliation	St. Freya Academy; Schicksal Valkyries 39 128
Occupation/Role	Former Senba Academy high-school student; Valkyrie 16 128
Status	Active 240
First Appearance	Chapter 16 16

Power Progression

Stage / Realm / Level	Chapter	Notes
Hokushin Itto-ryu swordswoman	16	Defeats three delinquents alone with a 1.2-meter wooden sword. 16
Nascent Herrscher / Queen of Raiden awakening	31	The Conquest Gem erupts prematurely; her eyes turn violet as the Queen of Raiden takes control amid a powerful Honkai Energy field. 31
Fully fused Herrscher of Thunder	36	Cocolia forcibly injects Honkai fluid until the Conquest Gem reaches its threshold and fuses perfectly with Mei. 36
Trained Valkyrie swordswoman	91	Rapidly learns Ishiu's techniques through her existing kendo foundation, earning the battlefield nickname “Sword Princess.” 91
Crimson armor ability awakened	120	After defeating a Knight-class and Ballista-class Honkai Beast, she awakens Stigmata-activated high-frequency slashes capable of cutting them apart almost instantly. 120

Background

Raiden Mei was the only daughter of Raiden Ryoma, president of ME Company. While attending Senba Academy as a second-year high-school student, she was well known as a gentle, helpful girl who firmly rejected confessions; this earned her the nickname “Queen of Raiden.” 16

After Ryoma was arrested for alleged economic fraud, Mei insisted that he had been framed. With her father imprisoned, her relatives and friends gone, and the household staff dismissed, she lived alone in the Raiden family villa and shut herself off from others. 16 29 Her first meaningful connection after this isolation was with Ishiu, who offered her bread after watching her drive away three harassers and spoke objectively rather than simply flattering her. 16 19

Mei later learned that Cocolia had framed her father and arranged the circumstances surrounding her Herrscher transformation. Ishiu eventually told Mei that Ryoma had been rescued and could be cleared of the charges, allowing her to stop pursuing evidence alone. 203 204

Appearance

Mei is a fair-skinned young woman with long hair, clear blue eyes, and a notably gentle demeanor. Her eyes become deep violet when the Queen of Raiden controls their shared body. 31 38 129

• Her hands bear calluses on the inner thumbs from years of sword practice. 39
• She normally dresses conservatively and adjusted her Crimson armor to cover exposed skin. 119
• In her Herrscher state, lightning surrounds her body and her hair streams behind her as she levitates. 129

Personality

Mei is polite, nurturing, and instinctively protective of people in need. Even after being isolated by her father's arrest, she did not resent others; instead, she initially sealed away her emotions and refused new friendships. Ishiu's patience gradually helped her open up. 16 19

She is conscientious and exceptionally diligent. At St. Freya, she trains longer than the other Valkyries and approaches both academics and combat with discipline rather than relying on talent alone. 239

Although usually soft-spoken, Mei becomes resolute when her friends or father are threatened. Kiana's injury drove her to confront Raven despite the overwhelming difference in experience, and she later chose to pursue Ishiu rather than surrender her feelings because of his existing relationships. 128 129 165

Abilities & Skills

Hokushin Itto-ryu and Kendo

Mei has years of sword training and uses disciplined, precise strikes in both civilian confrontations and Valkyrie combat.

• Defeated three adult delinquents with a wooden sword in under three minutes. 16
• Learns Ishiu's combat techniques quickly due to her existing swordsmanship foundation. 91
• Can use Flash Walk techniques well enough to track Raven's evasive movements, though she remains outmatched by Raven's experience. 129
• Continued to subdue harassers independently even after becoming a Valkyrie. 203

Herrscher of Thunder

Mei shares her body with the Queen of Raiden, an alternate consciousness tied to her Herrscher power and the Conquest Gem.

• The Queen can take control when Mei calls her or when Mei's emotions fluctuate intensely; Mei's blue eyes shift to violet during the change. 162
• The Queen commands immense lightning power, including barriers, electric nets, lightning pillars, and wide-area discharges that vaporize incoming attacks. 32 129
• Mei's consciousness remains intact rather than being consumed, but she cannot normally overpower the Queen for control of their body. 38 128
• Herrscher power can be suppressed by devices that drain Honkai Energy, though the suppression proved temporary. 129 131

Crimson Valkyrie Armor

Mei receives the Crimson battlesuit from Theresa and uses it in the Memory Battlefield. 115 119

• Amplifies her combat capabilities and can be visually adjusted to suit her preferences. 119
• Awakens high-frequency slashes by stimulating her Stigmata. 120
• Includes the standard Valkyrie-armor Time Fracture effect, a limited-use bullet-time state. 119

Equipment / Weapons / Items

• Wooden sword — Mei's preferred training weapon; she uses one over a meter long while practicing Hokushin Itto-ryu. 16
• Crimson armor — Her Valkyrie battlesuit, later modified for fuller coverage. 115 119
• Horm Swordsaint doll — A birthday gift from Bronya that recalls Ryoma's old kendo sparring games with Mei. 160
• Carved wooden sword — A birthday gift made by Yae Sakura, treasured by Mei for its craftsmanship. 160
• Coordinate Movement mark — A sword-shaped teleportation coordinate Ishiu placed on the back of her hand so he could reach her in danger. 39 131

Relationships

• Ishiu — Initially the boy who helped Mei emerge from isolation; later her boyfriend. He saved her from the Queen's first takeover, opposed Cocolia's experiment, and helped reveal the truth about Ryoma's case. 16 32 37 202 204
• Queen of Raiden — Mei's proud, lightning-wielding alternate consciousness. They share one body but possess separate feelings and frequently clash over the Queen's actions. 38 129 162
• Kiana Kaslana — Mei's close friend and fellow Valkyrie. Kiana protected Mei from Raven, encouraged her to pursue Ishiu, and supported her throughout her crises. 32 128 165 166
• Bronya — Fellow Valkyrie and trusted teammate. They coordinated against Raven, and Bronya gave Mei a Horm Swordsaint doll for her birthday. 129 160
• Raiden Ryoma — Mei's father and former ME Company president. She spent years trying to prove he had been framed and later introduced Ishiu to him as her boyfriend. 16 199 202
• Cocolia — Orchestrated Ryoma's framing and Mei's forced Herrscher transformation in pursuit of her Herrscher core. 36 37 203
• Theresa Apocalypse — Accepted Mei into St. Freya Academy despite her Herrscher status and provided her Valkyrie armor. 39 115

Story Role / Major Arcs

Changkong City Herrscher Incident

Mei's premature awakening as a Herrscher devastates Changkong City while the Queen of Raiden controls her body. Ishiu temporarily severs the Queen's connection to Honkai Energy and restores Mei, but Cocolia subsequently captures her for an experiment to extract the Conquest Gem. 31 32 36

Ishiu rescues the fully awakened Queen of Raiden from Cocolia's laboratory. The Queen agrees to return control to Mei in exchange for Ishiu telling her stories, establishing the arrangement through which the two consciousnesses coexist. 37 38

St. Freya and Valkyrie Training

Theresa accepts Mei at St. Freya Academy, where she receives Crimson armor, develops high-frequency slashes, and becomes a disciplined Valkyrie. 39 119 120

Raven's Attack

Raven targets Mei specifically as the Herrscher of Thunder. When Kiana is badly injured protecting Mei and Bronya is captured, Mei accepts the Queen of Raiden's assistance; the Queen takes control and nearly overwhelms Raven before being restrained by an Honkai-energy-draining chip. 128 129

Birthday and Romance

Mei's friends organize a birthday celebration that moves her deeply. She later recognizes that her feelings for Ishiu have changed from maternal affection into romantic love and decides to compete openly for him despite his relationships with Yae Sakura and Bronya. 159 165 167

Raiden Ryoma's Case

Mei introduces Ishiu as her boyfriend during a prison visit with Ryoma. After Ishiu learns the truth of Cocolia's role in Ryoma's imprisonment, he tells Mei that her father has been rescued and can eventually be publicly exonerated. 202 203 204

Notable Quotes

“My father... my father is not that kind of person! He was framed!” 16

“You are you, and she is she. Her mistakes are not yours to bear.” 204