Meikyō

Biodata

Feature	Details
Name	Uchiha Meikyō (明镜)
Alias(es)	Meikyō the Body Flicker; Meikyō the Decapitator; Scarlet Ninja; Red-Eyed God Slayer; Tsugikuni Yoriichi (disguise)
Species/Race	Human; Uchiha; Reincarnator
Gender	Male
Affiliation	Uchiha Clan; Konohagakure; Konoha Military Police Force; Demon Slayer Corps; Hero Association; Shichibukai
Occupation/Role	Shinobi, swordsman, S-rank hero, Uchiha clan elder, Deputy Head of the Konoha Military Police Force
Status	Alive
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Single-Tomoe Sharingan	1	Possessed a single-tomoe Sharingan at age ten, though his limited chakra control prevented prolonged use. 1
Two-Tomoe Sharingan	53	His Sharingan evolved in battle at age eleven, earning Fugaku's recognition and access to advanced clan ninjutsu and genjutsu. 53
Three-Tomoe Sharingan	97	Had reached the Three-Tomoe stage by age twelve; his swordsmanship was already considered beyond that of an ordinary jonin. 97
Hashira	111	Became a Hashira of the Demon Slayer Corps and required reinforced Nichirin Blades capable of enduring his Fire Style's heat. 111
Mangekyō Sharingan	135–174	His eyes evolved after receiving refined World Power; he awakened the Mangekyō in a crisis while protecting Dan Katō. 135 140 174
Great Swordsman	258	Perfected new Sun Breathing forms and defeated Momousagi by a narrow margin, establishing himself as a Great Swordsman. 258
S-rank Hero	278	Operated publicly as the Hero Association's “Scarlet Ninja,” gaining popularity through highly visible monster-slaying and rescue work. 278
Eternal Mangekyō Sharingan	296	His scarlet Eternal Mangekyō Sharingan was confirmed in use after resolving the ordinary Mangekyō's instability. 296
Wood Release	302	Nanobot-based physical modification greatly improved his vitality and recovery while restoring his Wood Release. 302
Yin-Yang Release	310	Awakened Yin-Yang Release, gaining the foundation to synthesize Six Paths power. 310
Rinnegan	311–312	Awakened the Rinnegan and learned to switch among Three-Tomoe Sharingan, Eternal Mangekyō Sharingan, and Rinnegan states. 311 312
Six Paths Yin Power	392	Used the Mind Stone's mental enhancement to generate a small but growing amount of Six Paths Yin Power. 392
Yang Power	404	Produced his first wisp of Yang Power after studying demonstrations by Hagoromo and Hamura. 404
Multiversal God / Inner Universe	422–425	Reached multiversal status, then absorbed shattered dimensions to form an inner universe and deepen his understanding of World Power. 422 425

Background / History

Meikyō is a Reincarnator who awoke in the body of a ten-year-old Uchiha shortly after the body's original owner lost both parents on the front lines of the Second Shinobi World War. He retained his prior memories but could not contact the Reincarnation Space, forcing him to survive through his own planning and the knowledge inherited from the original body. 1

He initially concealed his foreknowledge, reasoning that written intelligence about the future could be discovered and deciphered. His early priorities were improving chakra control, sustaining his Sharingan, obtaining resources, and avoiding the Uchiha Clan's internal power struggles until he had the strength to influence them. 1 9

Appearance

Meikyō has black hair, black eyes, fair skin, and refined but heroic features. His sword training and Sun Breathing give him a vivid, energetic presence. 168

• Often wears a green Konoha jonin vest beneath a blue-black haori bearing the Uchiha crest. 168
• Received a custom Demon Slayer Corps uniform and chose to retain the Uchiha crest on its haori. 89
• His Sharingan and Mangekyō Sharingan are distinctive enough to define his “Scarlet Ninja” identity in the Hero Association. 278
• Uses colored contact lenses while disguised to conceal the red coloration of his Sharingan. 181

Personality

Meikyō is strategic, patient, and intensely pragmatic. Even as a child, he understood that talent alone would not protect him from clan politics or war; he accepted Fugaku's patronage while privately resolving to rely on his own strength in the long term. 9

He is fiercely committed to strengthening the Uchiha Clan, though this commitment is inseparable from his belief that a stronger clan expands his own power and influence. He can cooperate with Fugaku despite their political differences when their interests align. 185 187

In combat, Meikyō favors efficient, decisive killing methods and is willing to use ruthless measures when he judges them necessary. He interrogated Hida Yuichi through genjutsu, returned with the noble's head, and later dismembered Dōma to prevent his regeneration. 27 120

Despite this ruthlessness, he respects people who sincerely protect others. He admires Ubuyashiki Kagaya's charisma and sincerity, values his teachers and comrades, and repeatedly acts as a mentor to younger shinobi and heroes. 60 123 277

Abilities & Skills

Dōjutsu

Meikyō's Uchiha bloodline and exceptional mental power made the Sharingan the foundation of his early combat style. His eyes progressed from one tomoe to Mangekyō, Eternal Mangekyō, and finally Rinnegan states. 1 53 97 296 312

• Amenotejikara — Instantly exchanges or teleports positions; he used it to reach Dan Katō and evade Rasa's attempt to trap his Susanoo. 171
• Amaterasu — Instant-cast black flames ignited through his Mangekyō gaze. 177
• Susanoo — Can manifest a third-stage golden armored samurai armed with the Sun Wheel Mirror. 171
• Rinnegan gravity control — Can manipulate gravity and generate repulsive force. 312
• Mirror God Eye — Allows him to comprehend, imitate, and refine other powers; he used it to study psychic abilities and later learned spatial techniques from Blast. 312 315 333
• Limits — Mangekyō use depletes Pupil Power slowly and strains his body; declining eyesight became a major concern before his later evolutions. 142 174

Swordsmanship and Breathing Techniques

Swordsmanship is Meikyō's principal fighting specialty. He combines Uchiha combat instincts, Sharingan perception, Breathing Styles, chakra enhancement, and Haki into a style built around overwhelming speed and lethal precision. 49 269

• Learned all nine forms of Flame Breathing after watching Rengoku Kyojuro once. 89
• Mastered Sun Breathing and used it to hinder Akaza's regeneration and destroy Dōma's Water Lily Bodhisattva. 106 120
• Possesses the Transparent World, allowing him to perceive minute changes in an opponent's body and movements. 138 182
• Defeated Momousagi using newly developed Sun Breathing forms, earning recognition as a Great Swordsman. 258
• Uses Armament Haki alongside Super Strength for close-quarters combat. 256
• Can employ Sage Mode, Susanoo, and a Wood Golem alongside his swordsmanship against high-level opponents. 328

Ninjutsu and Nature Transformations

Meikyō has broad ninjutsu proficiency, strengthened by Uchiha training, Dan Katō's instruction, Tsunade's medical teachings, and later cross-world study. 10 113 175

• Fire Style — Learned Dragon Fire Style and Phoenix Sage Fire from Uchiha Yu; later developed attacks such as Sword Leap Flame. 10 25
• Flame Release — Developed a Fire-and-Lightning fusion nature transformation with power comparable to or greater than his other elemental techniques. 354
• Wood Release — Regained Wood Release after genetic modification; can form durable Wood Clones with greater chakra storage and combat endurance than ordinary elemental clones. 302
• Super Strength — Learned Tsunade's chakra-enhanced strength technique. 175
• Medical Ninjutsu — Demonstrated medical talent sufficient to impress Tsunade during Uchiha Tatsu's surgery. 113
• Sealing Techniques — Understands basic sealing formulas and techniques such as the One Thread Light Formation. 99

Space-Time and Clone Techniques

Meikyō supplements his raw speed with several mobility, projection, and cloning techniques. 98 270 302

• Mirror Body Flicker Technique — An S-rank technique created by Kagami Uchiha using principles from Flying Thunder God, Clone Technique, and Uchiha genjutsu. 98
• Shadow Clones — Uses clones for parallel missions, reconnaissance, training, medical treatment, and weapon deployment. 90 121
• Wood Clones — More durable physical decoys capable of storing chakra for extended operations. 302
• Spirit Transformation Technique — Completed soul projection after defeating and absorbing his Mirror Body's soul essence. 270

Genjutsu and Spiritual Arts

Meikyō's mental strength was exceptional even as a child, nearly resembling the mental energy of two souls in Uchiha Yu's perception. 9

• Cast simple genjutsu without hand seals after improving his Sharingan control. 27
• Used genjutsu to interrogate Hida Yuichi and locate hidden funds. 27
• Studied Dan Katō's Spirit Activation Technique and eventually achieved full control over his own soul. 270
• Copied and integrated a Kamar-Taj mass-hypnosis spell into his genjutsu after observing it once. 381
• The Mind Stone enhances his already formidable mental power, genjutsu, psychic ability, and capacity for self-suggestion. 391

Six Paths Power and World Power

Meikyō's later growth centers on the fusion of Yin and Yang, Rinnegan evolution, and World Power. 310 392 425

• Yin-Yang Release — Can synthesize the basis of Six Paths power. 310
• Six Paths Yin Power — Generated through Mind Stone-assisted cultivation, then used to strengthen his Rinnegan and study the stone. 392
• Yang Power — Awakened after studying Hagoromo and Hamura's demonstrations. 404
• World Power — Learned its connection to evolution, soul creation, and universe generation from Tsugikuni Yoriichi. 135 425
• Inner Universe — Created an inner universe by absorbing shattered dimensions left after God's self-destruction. 425

Equipment / Weapons / Items

• Ama-no-Ohabari — Ancient Uchiha sword entrusted to Meikyō by Fugaku. When paired with Susanoo, it can become a spiritual weapon whose Totsuka Blade seals pierced targets into its gourd. 102
• Nichirin Blades — Uses custom Nichirin Blades with a greenish-gold and crimson-red coloration reflecting Wind, Lightning, and Fire affinities. 89 90
• Additional Nichirin Blades — Requested multiple reinforced blades so his Shadow Clones could also be armed against Upper Rank demons. 111
• Reincarnator's Wristwatch — Uses the wristwatch and the Dragon Vein's energy to locate and travel to worlds matching his criteria. 176
• Mind Stone replica — Arranged for Tony Stark to help create a replica, allowing the original stone to be used without immediate detection. 391 392
• Upper Rank demon samples — Retains blood samples from Dōma, Akaza, and Hantengu for future research. 138

Relationships

• Uchiha Yu — Mentor, protector, and political supporter. Yu recognized Meikyō's potential early, trained him in Fire Style and advanced techniques, and regarded him as a successor. 10 11 98
• Uchiha Fugaku — Clan Head, early patron, and political ally. Fugaku recruited Meikyō into his faction; the two later cooperated to consolidate influence within the Uchiha Clan. 9 185 187
• Dan Katō — Jonin instructor and one of Meikyō's most important bonds. Meikyō awakened the Mangekyō Sharingan while trying to protect Dan. 10 174
• Tsunade — Medical mentor. She taught him Super Strength and sought ways to mitigate the Mangekyō's physical burden. 113 175
• Inuzuka Ryō and Aburame Nami — Longstanding teammates. The three completed extensive mission work together and continued operating as a trusted unit. 20 27 140
• Uchiha Shisui — Younger cousin and protégé. Meikyō recognizes Shisui's potential, while Shisui admires his swordsmanship and strength. 111 138
• Uchiha Itachi — Younger clansman who seeks Meikyō's guidance on life and war; Fugaku hoped Meikyō would become Itachi's teacher. 174 229
• Tsugikuni Yoriichi — Teacher and cross-world ally. Yoriichi provided World Power, swordsmanship knowledge, and later discussed world creation with Meikyō. 135 425
• Genos — Student, training partner, and scientific collaborator. Meikyō guides Genos in combat while Genos assists with genetic modification and training facilities. 277 302
• Saitama — Friend and sparring rival. Their Kuiper Belt battle reached a universe-scale level and gave Meikyō insight into Saitama's singular existence. 422
• Fubuki — Training partner and romantic interest. They train together, discuss their futures, and go on a date. 333
• Tatsumaki — Ally and competitive training partner. Her psychic power helps operate Meikyō's high-gravity training regimen. 322 386

Story Role / Major Arcs

Reincarnation and the Uchiha Clan

After reincarnating into a young Uchiha, Meikyō accepts Fugaku's recruitment token to secure protection amid clan politics. Uchiha Yu subsequently trains him in Fire Style, swordsmanship, genjutsu, and later Kagami Uchiha's techniques. 9 10 19 98

He joins Dan Katō's squad alongside Inuzuka Ryō and Aburame Nami. During their early missions, he exposes Hida Yuichi's corruption, interrogates him through genjutsu, and returns the noble's head for intelligence extraction. 20 25 27

Demon Slayer Corps

Meikyō joins the Demon Slayer Corps, rapidly learns Flame Breathing, and becomes a Hashira. He confronts Upper Rank demons including Akaza and Dōma, using Sun Breathing and ninja techniques to overcome their regeneration. 89 106 111 120

During the battle against Kokushibo, he impersonates Tsugikuni Yoriichi to destabilize the Upper Rank One. His later connection with the real Yoriichi grants him World Power and advanced understanding of Breathing Techniques. 129 135

Uchiha Leadership and the Pirate World

After revealing the Mangekyō Sharingan in the Shinobi World, Meikyō becomes an Uchiha elder, Deputy Head of the Konoha Military Police Force, commander of its Tenth Squad, and overseer of its resource-management department. 187

In the Pirate World, he operates under the identity of Tsugikuni Yoriichi, studies Haki and local swordsmanship, captures Enel for body-tempering training, and defeats Momousagi. He accepts appointment as a Shichibukai to gain access to the New World. 182 251 258

Hero Association and Genetic Advancement

Meikyō enters the One-Punch Man world, becomes the S-rank hero Scarlet Ninja, and uses public hero work, interviews, and endorsements to fund genetic modification research. 275 278

With Genos and Dr. Kusuno's assistance, he undergoes modification that improves his vitality, recovery, and bloodline potential. His restored Wood Release, gravity training, and Mirror God Eye accelerate his growth beyond conventional shinobi limits. 302 312 332

Six Paths and Multiversal Conflicts

Meikyō awakens Yin-Yang Release and the Rinnegan, then refines Six Paths Yin Power through the Mind Stone. He fights Psykos-Orochi, spars with Blast in space, and develops spatial abilities based on Blast's power. 310 312 322 328 333

After entering the Marvel universe, he studies Kamar-Taj magic, assists the Ancient One against Shuma-Gorath's projection, acquires knowledge from the Mind Stone, and helps Thor transport Jane Foster to Asgard. 378 381 391 392

He later battles Saitama in the Kuiper Belt as a multiversal god, then absorbs dimensional fragments to create an inner universe and begin using World Power for soul and universe creation. 422 425 426

Notable Quotes

“I won't. Revitalizing the clan is also my goal.” 185

“Don't forget, I am strongest only when I hold a sword.” 269