Eiji

Biodata

Feature	Information
Name	Eiji (英司)
Alias(es)	“Konoha’s protector”; “Teacher Eiji” 30 59
Gender	Male
Age	11 at the Chunin Exams 1
Affiliation	Konohagakure; Uchiha clan; Uchiha Security Division 8 24
Occupation/Role	Shinobi; Security Division member and later head; Uchiha clan head; Fifth Hokage 8 95 109 112
Status	Active 167
First Appearance	Chapter 1
Template	Senju Tobirama template 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Senju Tobirama Template	1	Possesses advanced Water Release, chakra sensing, and a passive enhancement when fighting Uchiha.
Two-Tomoe Sharingan	1	Used during his Chunin Exam match against Itachi.
Ninja World Scientist	14	Instantly learns Fire Release: Great Fire Annihilation after reading its scroll once.
Upgraded Ninja World Scientist	27	Can learn ninjutsu, taijutsu, and genjutsu whenever the technique conforms to scientific theory.
Three-Tomoe Sharingan	27	Awakens after completing a mission involving the Masked Man and protecting Konoha.
Sage Mode	43 44	Masters Mount Myōboku Sage Mode with no preparation time, no need to gather natural energy, and minimal physical change.
Mangekyō Sharingan	89 99	Gains immunity to the normal side effects of Mangekyō use; later uses its genjutsu to control Orochimaru and interfere with Impure World Reincarnation.
Rinnegan	131	Activates Nagato/Madara-derived Rinnegan abilities, including Shinju Absorption, Chakra Devouring, Chibaku Tensei, Tengai Shinsei, and Limbo: Hengoku.
Indra–Asura Bloodline Fusion / Six-Tomoe Rinnegan	150	The system fuses his upgraded Uchiha and Senju bloodlines, grants Six-Tomoe Rinnegan, and awakens Kamitsumikami.
Ten-Tails Jinchūriki	153	Manifests as the Ten-Tails’ jinchūriki and imprisons Kaguya in his internal space.
Kaguya’s Power	159 160	Commands Kaguya’s power in battle, a state recognized by Momoshiki as having seized Kaguya’s power.

Background

Eiji transmigrated into the ninja world three years before the Chunin Exams and awakened a character-template system. After drawing the Senju Tobirama template, he began completing system missions to obtain Tobirama’s abilities and techniques 1.

His father had been Kagami Uchiha’s student and died protecting Konoha during a previous war. Hiruzen Sarutobi therefore regarded Eiji as an indirect inheritor of Kagami’s Will of Fire, though Eiji’s methods often resembled Tobirama’s ruthlessness more than Hiruzen’s idealism 2 59 99.

At age eleven, Eiji entered the Chunin Exams alone and faced Itachi in the first third-stage match. He defeated Itachi with two-seal Water Release, superior physical ability, and swordsmanship specifically suited to counter the Sharingan. Both were promoted to Chunin afterward 1 2.

Appearance

Eiji is a white-haired Uchiha youth whose unusual appearance and Water Release repeatedly cause observers to compare him to Senju Tobirama 1 2.

• White hair, conspicuous even in crowds 1 2
• Initially possesses two-tomoe Sharingan, later evolving through three tomoe, Mangekyō, and Rinnegan states 1 27 99 150
• Commonly carries a sword, usually Xiao Er 1 3
• Wears the Hokage robe after becoming Fifth Hokage 159

Personality

Eiji is calculating, opportunistic, and highly conscious of power dynamics. He accepts the Uchiha elders’ support while privately deciding to extract as much benefit from them as possible, including scrolls, weapons, allowances, and explosive tags 3 5.

He is also an adept manipulator. When Shisui questions his loyalties, Eiji turns the conversation around until Shisui appears to be the one advocating rebellion, while Eiji presents himself as a peaceful adherent of the Will of Fire 12.

Despite his self-serving habits and disregard for convention, Eiji consistently acts to preserve Konoha and prevent the Uchiha from being destroyed. He takes responsibility for Security Division investigations, protects Naruto, exposes threats within Konoha, and later leads the village as Hokage 23 24 59 109.

Abilities & Skills

Senju Tobirama Template

Eiji’s system-derived template forms the basis of his combat style. It grants him Tobirama-like sensory ability, Water Release mastery, space-time techniques, and specialized advantages against Uchiha opponents 1 60.

• All of his abilities are enhanced when fighting Uchiha 1
• Detects chakra and life force without hand seals over an enormous range 60
• Uses multiple techniques associated with Tobirama, including Flying Thunder God, Impure World Reincarnation, and Mutual Explosion Tag Technique 60

Water Release

Water Release is Eiji’s primary elemental specialty. He can perform powerful techniques with only two hand seals and adapt water into offensive and defensive forms 1.

• Forms a water wall into a Water Dragon to defeat Itachi 1
• Uses Hard Whirlpool Water Blade to create a piercing water javelin that becomes a cutting Water Dragon Tornado 26
• Uses Water Severing Wave to cut through Hashirama’s Deep Forest Emergence 99
• Learns Kirigakure techniques such as Exploding Water Colliding Wave and Water Gun Technique within minutes 93
• Combines Sage Mode with Water Release for techniques such as Sage Art: Water Dragon Bite Explosion 120

Swordsmanship and Taijutsu

Eiji is a formidable close-quarters fighter whose physical power and sword technique can overwhelm Sharingan users even when they predict his movements 1.

• Defeated Itachi in a direct sword fight and broke his defenses despite the latter’s Sharingan 1
• Overpowered the more experienced Inaho in a sparring match 14
• Studies ways to combine Tobirama’s swordsmanship with Uchiha taijutsu 15
• Uses Flying Thunder God positioning to create sudden sword-strike opportunities 26 104

Ninja World Scientist

This passive allows Eiji to rapidly comprehend, reproduce, and eventually create techniques based on their underlying principles 14 27.

• Learns Fire Release: Great Fire Annihilation after reading its scroll once 14
• Masters the Uchiha Body Technique through only a few practice attempts 14
• Learns the Earth Style: Ultra-Lightweight Rock Technique immediately after observing Ōnoki’s instruction 130
• Enables rapid acquisition of foreign villages’ secret techniques 93

Fire Release and Genjutsu

Although best known for Water Release, Eiji can also use high-level Uchiha Fire Release and illusion techniques 14 15.

• Fire Release: Great Fire Annihilation — creates a sea of flames powerful enough to vaporize river water 15
• Bringer-of-Darkness Technique — earned as the reward for defeating Itachi during the Chunin Exams 1
• Darkness of the Blooming Darkness — used to defeat Inaho during their spar 14

Sharingan and Mangekyō Sharingan

Eiji’s Sharingan develops unusually through system progression rather than conventional emotional trauma 27.

• Uses two-tomoe Sharingan in his battle against Itachi 1
• Awakens Three-Tomoe Sharingan after interpreting his desire to protect Konoha as sufficient emotional fluctuation 27
• Uses Mangekyō genjutsu to dominate Orochimaru’s will 99
• Can use Mangekyō abilities without their usual side effects 89
• Uses Omokami-no-Me to calculate the optimal response to Killer B’s fighting style 120

Sage Mode

Jiraiya brings Eiji to Mount Myōboku after the Great Toad Sage identifies him as possessing a heart of justice 43.

• Enters Sage Mode instantly and flawlessly 44
• Requires no visible natural-energy gathering period 44
• Gains greatly enhanced strength, speed, sensory ability, and ninjutsu output 44 59
• Defeats Kakuzu using Sage Mode-enhanced Water Release 59
• Uses Sage techniques to defeat the Six Paths of Pain alongside Jiraiya 104 105

Space-Time Ninjutsu and Sealing

Eiji uses Flying Thunder God techniques with marked kunai and has extensive sealing knowledge 26 60.

• Flying Thunder God: Second Step — teleports to marked kunai to evade and counterattack 26
• Uses Flying Thunder God to escape Pain’s gravitational pull and strike from blind spots 104
• Possesses Four Red Yang Formation, Soul Seal Technique, and Impure World Reincarnation 60
• Seals Madara after defeating him in battle 140
• Uses Takemikazuchi-no-Mikoto to prevent Urashiki’s escape 159

Rinnegan and Six Paths Powers

After activating the Rinnegan, Eiji gains access to high-level techniques associated with Madara’s eye power 131.

• Chibaku Tensei — creates gravitational sealing spheres 131 139
• Limbo: Hengoku — creates four invisible clones to surround Madara 139
• Tengai Shinsei — listed among his Rinnegan abilities 131
• Kamitsumikami — creates a temporary domain that negates a chosen concept or rule 150
• Uses Six Paths-infused weaponry and All-Killing Ash Bones against Ōtsutsuki opponents 159

Kaguya and Ten-Tails Power

Eiji imprisons Kaguya within his internal space and can compel her assistance despite her hostility toward him 153 159.

• Manifests as the Ten-Tails’ jinchūriki 153
• Draws on Kaguya’s chakra against Toneri 167
• Summons Kaguya to perform the Eighty Gods Vacuum Attack against Urashiki 159
• Uses All-Killing Ash Bones to kill Urashiki and seize his Rinnegan 159

Equipment / Weapons / Items

• Xiao Er (Izuna Slash) — Eiji’s primary sword; originally awarded by the system upon his Ninja Academy graduation and said to be Tobirama’s blade against Izuna 1 60
• Muramasa — a sword whose blade supposedly condenses water droplets to wash away blood after a kill 95
• Explosive Tags — possesses an extreme stockpile, listed at six hundred million tags 60
• Flying Thunder God kunai — used as teleportation markers 26 104
• Kuro / Little Black — a jet-black eagle summoned and directed by Eiji 17

Relationships

• Naruto Uzumaki — Student and close companion. Eiji teaches Naruto chakra control and basic ninjutsu, while Naruto refers to him as “Teacher Eiji” and worries about his safety 30 31 52.
• Kakashi Hatake — Ally and investigative partner. Though initially suspicious of Eiji’s contact with Naruto, Kakashi later works with him against the Masked Man, Akatsuki, and other threats 8 26 30 49.
• Jiraiya — Mentor. Jiraiya teaches Eiji Sage Mode, entrusts Naruto’s care to him, and later fights beside him against Pain 43 44 104 105.
• Hiruzen Sarutobi — Political patron and admirer of Eiji’s perceived inheritance of Kagami’s Will of Fire 2 16 59.
• Fugaku Uchiha — Clan leader who gradually entrusts Eiji with the Uchiha’s future; Fugaku eventually relinquishes the clan head and Security Division positions to him 24 60 95.
• Itachi Uchiha — Former rival. Eiji defeats him in the Chunin Exams, later exposes his betrayal of the Uchiha, and kills him before the planned clan massacre can occur 1 83 93.
• Inaho — Security Division senior and early supporter who provides Eiji with clan scrolls, equipment, and practical assistance 3 5 14.
• Kaguya Ōtsutsuki — Prisoner within Eiji’s internal space and reluctant combat ally; she assists him against Ōtsutsuki enemies due to her resentment of the clan 153 159 167.

Notable Quotes

“I, Uchiha Eiji, will be forever loyal to the Uchiha!” 24

“Whoever dares to threaten Konoha, I will personally deal with them.” 59

“I am Uchiha Eiji, the Fifth Hokage of Konohagakure.” 154

Trivia

• Eiji publicly tells Inaho that Xiao Er is a keepsake from his father, while the system narrative identifies it as a graduation reward 1 3.
• His appetite and financial priorities are recurring concerns; he initially joins the Security Division in part because it provides daily meals 8.
• He treats the Masked Man’s repeated attacks on Konoha as opportunities to gain mission rewards and strengthen himself 27.
• His status panel lists both Tobirama-derived forbidden techniques and an enormous reserve of explosive tags, reflecting his preference for overwhelming preparation 60.