Fuyuki

Biodata

Feature	Value
Name	Fuyuki (冬树)
Alias(es)	Moon Worm; Lord Eclipse
Species/Race	Human; Hyuga Clan Main Branch
Gender	Male
Affiliation	Hyuga Clan; Konohagakure; Land of Whirlpools
Occupation/Role	Hyuga young master; ninja; founder and power behind the Land of Whirlpools
Status	Active
First Appearance	2

Power Progression

Stage / Realm / Level	Chapter	Notes
Yin–Yang Spirit hybrid form	35	Uses Miroku's Shadow Mirror Body Transfer to become a hybrid clone of Yin- and Yang-Style Spirits; gains heightened perception and a powerful body.
Fusion Spirit integration	104	Integrates the Fusion Spirit into his body, allowing instinctive control of the five elements and Yin–Yang Chakra; can replicate most elemental techniques he observes.
Sage Mode / Animate Inorganic Reincarnation combat use	90	Defends Konoha by controlling inorganic life and creating a hundred-meter Lava Release Giant; severe Chakra consumption limits sustained use.
Tenseigan Chakra Mode / Super Shadow Level	158	Activates pale-purple Chakra Mode, gains flight and uses Silver Wheel Reincarnation Explosion to overwhelm Killer B and the Eight-Tails.
Super Kage	174	Signs a biological contract with Kaguya-hime and gains part of her power; remains below Six Paths level because he lacks Truth-Seeking Orbs at this point.
Tenseigan-centered Black Moon system	190	Develops a system that uses the Tenseigan as its core, Kaguya-hime's Chakra as a relay, and summoned beasts as support.
Kamimusubi Mode	270	Awakens his exclusive dōjutsu, Kamimusubi; manifests horns, black Truth-Seeking Orbs, and a robe formed from those orbs.
Six Paths Mode: State Two — Kamimusubi	321	Uses an advanced Kamimusubi state while leading operations against isolated Ōtsutsuki across parallel worlds.

Background

Fuyuki is the Hyuga Clan's young master and Hiashi's rebellious son. From childhood, he disregards noble etiquette and his father's intimidation, believing strength matters more than formal discipline. He is repeatedly described as unusually confident, stubborn, and difficult for the clan to manage. 2 11

He is deeply protective of his sisters. After learning Hinata is bullied, he decides to accompany her on walks; later, he impersonates her at the Ninja Academy to expose and punish students who target girls. 2 20

Fuyuki develops techniques outside conventional Hyuga training, drawing criticism from the Great Elder. His independent research eventually produces new Gentle Fist techniques that significantly raise the clan's overall strength and win over its elders. 21 49

He later helps establish the Land of Whirlpools rather than merely restoring the Uzumaki Clan, placing Karin at its head as its first queen. 79 101

Appearance

Fuyuki has long hair and a notably feminine or androgynous appearance; he can convincingly impersonate Hinata and is compared to Haku because both are boys with feminine looks. 11 20 230

• A Hyuga Main Branch member with Byakugan. 2 53
• Usually wears his long hair loose; later appearances include a high ponytail. 11 215
• Can use a permanent Transformation Technique. 79
• In Tenseigan Chakra Mode, he is surrounded by pale-purple Chakra flames, grows an illusory horn, and floats. 158
• In Kamimusubi Mode, his hair and skin whiten, Kaguya-like horns emerge, and Truth-Seeking Orbs form a long robe and laurel-like head ornament. 270

Personality

Fuyuki is irreverent, provocative, and openly resistant to clan expectations, particularly etiquette classes and arranged marriage. He frequently answers authority with sarcasm rather than obedience, including Hiashi, elders, teachers, and powerful outsiders. 2 11 95

He is highly opportunistic and practical. He uses money to outsource missions, treats official assignments as travel cover, and builds political power through the Land of Whirlpools. 51 79 137

Despite his self-serving habits, Fuyuki consistently protects people he considers his own. He defends Hinata and Hanabi, protects Konoha during invasion, tries to steer Nagato away from despair, and ultimately accepts the danger of fighting Isshiki after Sasuke risks himself for him. 2 90 208 247 270

Abilities & Skills

Byakugan and Gentle Fist

Fuyuki uses the Hyuga Clan's Byakugan with an unusually lethal Gentle Fist style focused on meridians, internal organs, vital points, and weaknesses rather than restraint. 24

• Uses Byakugan perception to trace Yin-Style Chakra and identify hidden threats. 12
• Integrates Strong Fist principles into Gentle Fist, making his attacks more aggressive than traditional Hyuga techniques. 24
• Created the Eight Trigrams Collapse Strike, a Gentle Fist technique connected to opening the Eight Inner Gates for increased Chakra. 21
• Can damage or strike at a target's soul through his techniques. 84
• His theoretical Vacuum Attack is described as an ultimate-level taijutsu, but its Chakra requirement is too high for ordinary Hyuga to practice. 49

Yin–Yang Release and Elemental Spirits

Fuyuki summons and commands Elemental Spirits formed from Yin- and Yang-Style Chakra. 12 59

• A Yang-Style Chakra spirit heals injuries and temporarily enhances his physique for three minutes. 12
• The Yin–Yang Spirit grants sharp perception and physical strength when used in hybrid form. 35
• His Yin–Yang Release proficiency grants extraordinary healing; wounds can close almost immediately. 64
• After integrating the Fusion Spirit, he can control the five elements and Yin–Yang Chakra almost instinctively. 104
• His Fusion Spirit can create fused elemental constructs, including a hundred-meter Lava Release Giant. 90

Summoning and Spirit Binding

Fuyuki has extensive summoning abilities and treats powerful entities as contracted allies or pets. 35 137 176

• Uses Spirit Binding Technique to restrain targets such as Yota and Moryo. 12 35
• Captures Moryo and forces the former Demon King into a master-pet relationship. 38
• Signs a biological contract with the Nine-Tails. 137
• Signs a biological contract with Kaguya-hime, gaining access to part of her power. 174
• Successfully summons Spirit King Igabella. 176

Sage Techniques

Fuyuki studies Ryūchi Cave's Sage Mode and develops powerful Sage Art applications. 59 60

• Uses Sage Art: Animate Inorganic Reincarnation to control terrain and inorganic material over a wide area. 90 158
• In an Animate Inorganic Reincarnation zone, he can move through the environment quickly enough that Killer B cannot catch, touch, or locate him. 158
• Uses White Rage Technique, an acoustic ninjutsu that disrupts an opponent's senses and nervous system. 208

Tenseigan Techniques

Fuyuki develops a Tenseigan-based combat system supported by Kaguya-hime and his summoned beasts. 176 190

• Tenseigan Chakra Mode grants flight, physical enhancement, and powerful Chakra constructs. 158 219
• Silver Wheel Reincarnation Explosion creates a silver hurricane capable of redirecting Tailed Beast Bombs and devastating large areas. 158 208
• Can gather Truth-Seeking Orbs over his body to physically overpower the Five-Tails, Kokuō. 219
• Can absorb enemy Chakra and turn it into a Chakra bomb; the technique is especially effective against opponents with massive Chakra reserves. 219
• Seals Toneri's Giant Tenseigan before defeating him in close combat. 208

Kamimusubi

Kamimusubi is Fuyuki's exclusive dōjutsu, awakened when he chooses to confront Isshiki. 270

• Its first documented ability is Soul-Life Fate, used against Isshiki. 270
• Kamimusubi Mode manifests Truth-Seeking Orbs and a Kaguya-like transformation. 270
• Its later power is amplified by the Moon Eye ability Great Master Life, which greatly boosts Fuyuki's Yin Release and helps form a new Kekkei Mōra. 328

Space–Time Ninjutsu

Fuyuki can travel through space and open interdimensional passages. 293 321

• Uses Yomotsu Hirasaka to open spatial vortices and transport people. 293 329
• Opens a Cross-Star Slash spatial rift. 321
• Travels between parallel worlds during operations against Ōtsutsuki. 321 331

Equipment / Weapons / Items

• Elemental Dawn Summoning Scroll — allows the summoning of high-level spirits. 51
• Summoning Scrolls — used by his group for communication and summoning-related tasks. 12
• Ninja Tool Pouch — carries prepared scrolls and tools. 137
• Uchiha Fugaku's Mangekyō Sharingan — provides Amaterasu and Kagayaki; Kagayaki inflicts extreme mental damage through a Mangekyō-created genjutsu space. 35 37

Relationships

• Hyuga Hiashi — father; their relationship is strained by Fuyuki's defiance, though Hiashi recognizes his strength and contributions to the clan. 2 94 148
• Hyuga Hinata — younger sister; Fuyuki protects her from bullies and later fights Toneri partly to avenge her. 2 208
• Hyuga Hanabi — younger sister; Fuyuki is affectionate and protective toward her, promising to teach her powerful jutsu and shielding her from a Tailed Beast Bomb. 95 219
• Natsumi — exclusive maid and trusted confidante; she knows many of his secrets and supports him without reporting everything to the Main Branch. 12
• Kaguya-hime — ancestor and biological-contract partner; she considers Fuyuki her child and gives him maternal support. 16 174 270
• Karin — fiancée and queen of the Land of Whirlpools; their relationship is playful, affectionate, and politically significant. 79 250 310
• Anko Mitarashi — squad leader and teacher; their relationship is teasing and unconventional. 50 51
• Uchiha Sasuke — close ally and friend; Sasuke's willingness to risk his life inspires Fuyuki to face Isshiki. 270
• Moryo — captured former Demon King; reduced to Fuyuki's summoned pet and assigned work to repay a debt. 38
• Toneri Ōtsutsuki — lunar opponent whom Fuyuki deceives, defeats, and later brings to Earth under strict warning. 206 208 210
• Haku — initially treated as a tool or hostage, later works at Fuyuki's Hot Spring Hotel and maintains a favorable view of him. 69 230
• Spirit King Igabella — powerful summoned spirit; Fuyuki must adapt to her playful, seductive personality after summoning her. 176

Story Role / Major Arcs

Hyuga Clan and Academy

Fuyuki begins as the Hyuga young master who skips etiquette lessons, clashes with Hiashi, and decides to protect Hinata from bullying. He later impersonates Hinata at the academy to punish bullies directly. 2 20

Spirit and Moryo Arc

After being struck by mysterious lightning, Fuyuki traces the attacker with his Byakugan, confronts Yota, and demonstrates Spirit Binding. He later infiltrates the Land of Demons, confronts Moryo, and captures the Demon King as a pet. 12 35 38

Land of Waves and Ryūchi Cave

Fuyuki leads Anko, Natsumi, and Himon out of Konoha under the guise of missions, pursues Haku's Ice Release, captures the Three-Tails, and enters Ryūchi Cave to pursue Sage Mode and a snake summoning contract. 51 52 59 60

Founding the Land of Whirlpools

Rejecting the idea of merely rebuilding the Uzumaki Clan, Fuyuki plans a sovereign Land of Whirlpools with Karin as queen. He develops the territory, gathers allies and summoned beasts, and prepares it to withstand Kirigakure. 79 101 137

Kaguya-hime and Tenseigan Development

Fuyuki signs contracts with Kaguya-hime and Spirit King Igabella, develops a Tenseigan-centered combat system, destroys and triggers the restoration of the moon, then defeats Toneri on the moon. 174 176 190 208

Ōtsutsuki and Parallel Worlds

After severe injury and Sasuke's intervention, Fuyuki awakens Kamimusubi Mode to fight Isshiki. In the aftermath, he organizes expeditions across parallel worlds to defeat isolated Ōtsutsuki and recover their resources. 270 321 331

Trivia

• Fuyuki's refusal of arranged marriage becomes a major point of conflict with Hiashi and the Hyuga elders. 94 95
• He owns a Hot Spring Resort and uses wealth as freely as combat power, including outsourcing D-rank missions. 37 51
• Fuyuki's reputation causes others to assume his motives are romantic even when he is pursuing intelligence, money, or political objectives. 215 250
• He and Hinata frequently swapped identities at the Ninja Academy. 20 335