Mei

Biodata

Feature	Details
Name	Raiden Mei (芽衣)
Alias(es)	Queen Raiden; Third Herrscher; Herrscher of Thunder; Miss Herrscher of Thunder
Species/Race	Human; host of the Herrscher of Thunder
Gender	Female
Affiliation	Senba Academy; Qin Mo's party
Occupation/Role	Student; combatant
Status	Active
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Hokushin Itto-ryu master	3	Already proficient enough that ordinary school bullies would be no match for her; she avoids solving problems through violence due to her kind nature.
Herrscher of Thunder awakening	7	The Great Honkai awakens the Third Herrscher within Mei, creating a hostile Herrscher persona with immense Honkai Energy and lightning control.
Hamon basics	12	Learns Hamon alongside Kiana, though she initially struggles to maintain its breathing rhythm.
Stigmata: Crazy Diamond	12 13	Qin Mo applies the S-rank Crazy Diamond Stigmata to her back, granting her a repair-type Stand.
Shared Shadow Legion	43	Qin Mo transfers the energy of ten Shadow Legion ninja soldiers to Mei for errands, cleaning, and simple tasks.
Love Train connection	44	Qin Mo links Mei to his Love Train ability, allowing shared power and a means to transfer excess Honkai Energy away from her body.

Background / History

Raiden Mei was the only child of Raiden Ryoma and a prominent student at Senba Academy. Known as “Queen Raiden,” she was surrounded by people drawn to her family’s wealth and status, but recognized that most of them were not genuine friends. Her father was the person she cared about most. 2

After Ryoma was arrested for alleged economic fraud and the Raiden family’s assets were frozen, Mei lost her social standing overnight. Former acquaintances abandoned her, while classmates sent her insulting letters, vandalized her desk, and stole her belongings. She endured the abuse quietly rather than retaliating. 2

Qin Mo’s repeated flower gifts and confessions began as a daily routine, but he became one of the few people to remain beside Mei after her fall from status. He returned her stolen schoolbag, confronted one of her former followers, and shared meals with her on the rooftop. Mei gradually accepted his presence, preserving the bouquets he gave her in her otherwise empty home. 2 3

The Great Honkai awakened the Herrscher of Thunder within Mei. While the Herrscher persona initially emerged as a destructive threat, Qin Mo reached her despite severe Honkai corruption and accepted the other consciousness as part of Mei. Following the incident, Mei struggled with guilt over the harm caused by her power but chose to continue travelling with Qin Mo and Kiana. 7 8 9

Appearance

Mei is a slender, fair-skinned girl who initially wears Senba Academy’s sailor-style uniform. During the journey through the world of JoJo’s Bizarre Adventure, she chooses a light-purple top and long skirt with purplish-red patterns. 12 16

• Fair skin. 12
• Slender build. 27
• Often carries or receives flowers from Qin Mo. 2 4
• Her Herrscher persona manifests purple lightning and bright red eyes. 22

Personality

Mei is gentle, considerate, and quietly resilient. Even when her classmates turn against her after her father’s arrest, she refuses to lash out or rely on violence despite being capable of defending herself. The loss of her father’s support leaves her emotionally vulnerable, but she continues enduring her circumstances with dignity. 2 3

She is deeply protective of the people close to her. Mei worries over Qin Mo when he is injured, immediately tends to Kiana after battles, and welcomes Bronya after learning that Bronya had been controlled through a brain chip. 19 26 35

Mei is also prone to guilt, particularly over the destruction associated with the Herrscher of Thunder. With Qin Mo and Kiana’s support, she resolves not to remain passive and to guide the nascent Herrscher consciousness rather than simply fearing it. 9

Abilities & Skills

Herrscher of Thunder

Mei possesses the potential to become a Herrscher because she was born with Stigmata and later received the Conqueror Gem, which carries the Herrscher of Thunder’s authority. 21

• Generates and manipulates powerful lightning and Honkai Energy. 7 22
• Houses a distinct Herrscher consciousness capable of taking control of her body. 8 22
• The Herrscher persona can resist mental control, as shown when it broke free of Anubis God’s possession. 22
• The Herrscher persona retains Mei’s memories, but Mei may not remember events that occur while it is in control. 22
• Mei fears harming others through uncontrolled Honkai Energy and initially blames herself for the Great Honkai’s casualties. 9

Crazy Diamond

Mei’s Crazy Diamond is an S-rank Stand acquired through a Stigmata applied by Qin Mo. It repairs damaged objects and can restore certain physical injuries. 12 13

• Repairs shattered objects, demonstrated by restoring a broken chair. 13
• Repairs damaged vehicle parts while travelling at high speed, including melted tires. 19
• Can assist in treating injuries, such as healing an injured civilian and tending to Kiana. 15 26
• Functions as a close-range combat Stand capable of powerful punches and protective rescues. 34 37
• Cannot replace matter that has been completely erased or lost; injuries involving missing flesh cannot be fully repaired. 26

Hokushin Itto-ryu

Mei is a master of Hokushin Itto-ryu martial arts. Her skill means that ordinary students pose little physical danger to her, though she prefers not to solve personal conflicts with force. 3

Hamon

Mei learns the basics of Hamon from Qin Mo and Joseph Joestar’s training methods. 12

• Can use the breathing-based life-energy technique at a basic level. 12 35
• Has difficulty maintaining the required breathing rhythm consistently. 12
• Is far less proficient with Hamon than Qin Mo. 35

Shared Powers

Qin Mo shares several abilities with Mei to improve her safety and daily life.

• Shadow Legion — Mei receives the energy of ten shadow soldiers. The soldiers can follow simple commands, move through narrow gaps, and perform chores, but have no consciousness. 43
• Love Train connection — A power-sharing link between Mei and Qin Mo that can help transfer excess Honkai Energy from Mei to Qin Mo. 44

Equipment / Weapons / Items

• Stigmata: Crazy Diamond — An S-rank Stigmata applied directly to Mei’s back, granting her the Stand Crazy Diamond. 12
• Moon Shadow — A peculiar sword discussed by Mei and Qin Mo for its ability to harm Stands through its magical and Honkai-related properties. 16
• White Album & Black Album — Defensive equipment Qin Mo distributes to Mei and Kiana during their journey. 13

Relationships

• Qin Mo — Close companion and persistent suitor. His support during Mei’s isolation, his acceptance of both her and the Herrscher persona, and their shared Love Train connection deepen their trust. 2 8 33 44
• Kiana Kaslana — Mei’s close friend. Kiana defends Mei, worries about her Herrscher nature, and remains by her side through their travels. 6 9 26
• Bronya — Friend whom Mei welcomes after Qin Mo removes Bronya’s control chip. Mei later regrets suspecting Bronya’s contact with Cocolia and resolves to care for her more. 35 43
• Raiden Ryoma — Mei’s father and only family. His imprisonment devastates her; Qin Mo later reveals that Cocolia framed him because of his Anti-Entropy affiliation. 2 21
• Herrscher of Thunder — A separate consciousness within Mei’s body. Though initially arrogant and destructive, she protects Qin Mo, retains Mei’s memories, and does not permanently suppress Mei’s consciousness. 8 22
• Cocolia — The Anti-Entropy radical who implanted the Conqueror Gem in Mei and framed Raiden Ryoma. 21

Story Role / Major Arcs

Fall of the Raiden Family

Mei’s father’s arrest strips her of her social protection at Senba Academy and makes her a target of sustained bullying. Qin Mo’s continued presence becomes a major source of support during this period. 2 3

Great Honkai and Herrscher Awakening

The Great Honkai awakens the Herrscher of Thunder. The Herrscher persona becomes hostile, but Qin Mo’s confession and willingness to endure Honkai corruption persuade her to accept his presence. 7 8

Journey through the *JoJo* World

After Qin Mo’s System transports Mei, Kiana, and Qin Mo to another world, Mei confronts her guilt and joins the mission against DIO’s forces. She receives Crazy Diamond, uses it to repair allies and equipment, and repeatedly fights alongside the group. 9 12 19

Anubis God Possession

Anubis God takes control of Mei’s body and uses her to wound Qin Mo. The Herrscher of Thunder breaks the Stand’s control, destroys Anubis, and takes responsibility for protecting Qin Mo in her own manner. Mei later awakens with no memory of the incident. 22

Return to Chang Kong City

After returning to Chang Kong City, Mei helps Qin Mo and Kiana escape Senba Academy, battles Honkai Beasts and mechs, and supports the rescue of Bronya. 33 34 35

St. Freya Academy

Mei travels with Qin Mo’s group to St. Freya Academy aboard the Hyperion. She continues acting as a protector within the group and later receives Qin Mo’s Shadow Legion and Love Train support. 38 43 44

Trivia

• Mei’s 17th birthday is celebrated with a surprise party organized by Qin Mo and her friends. 49
• She preserves Qin Mo’s bouquets even though she initially does not directly answer his daily confessions. 3
• Mei’s wish is simple: to remain with the people she cares about, especially her father and friends. 21