Fu Yuan

Biodata

Feature	Details
Name	Fu Yuan (符渊)
Alias(es)	Saber; Restraint; Banished Immortal 1 120
Species/Race	Human; manifests as a Heroic Spirit and possesses Herrscher/“Constraint” power 1 114
Gender	Male 1 47
Age	553 years old in Schicksal's records 120
Affiliation	Kiritsugu Emiya's side in the Fourth Holy Grail War; Schicksal; St. Freya Academy; Wu Shuang Sect; Chaldea 1 107 120 123
Occupation/Role	Saber-class Servant; S-rank Valkyrie; swordsman; magus 1 123
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Saber manifestation	1	Summoned as Saber with B Strength, A Endurance, A Agility, C–EX Magic, and an EX Noble Phantasm.
Lawful Neutral — Child of Purity form	2	At 158 cm, retains a portion of the Child of Purity's talent: others find him easier to trust, and he gains strong perception; Luck is A.
Divine Servant: Restraint manifestation	2 5	At 165 cm, loses earlier talents but gains Demonic Possession, Divinity, and fuller access to Restraint's power, including golden chains and a golden spear.
Chaotic Neutral combat state	35	Demonic Possession corrects non-A parameters to A-rank; his displayed parameters rise to A Strength, A+ Endurance, A+ Agility, and A–EX Magic.
Lawful Neutral adult form	36	At 178 cm, possesses combat wisdom and high learning ability rather than Child of Purity's talents; uses Heavenly Fire—Unsheathe.
Post-war Spirit Core state	47	Displayed with A+ Strength, EX Endurance, EX Agility, EX Magic, EX Noble Phantasm, EX Magic Resistance, and EX Soul Materialization.
Third Magic user	68 100	Obtains the Third Magic, enabling him to manifest and influence the Greater Grail and to reconstruct materials while removing or minimizing their flaws.

Parameters

Parameter	Saber Summoning	Later Display
Strength	B 1	A+ 47
Endurance	A 1	EX 47
Agility	A 1	EX 47
Magic	C–EX 1	EX 47
Noble Phantasm	EX 1	EX 47
Luck	Unknown 1	Unknown 47

Background / History

Taixu disciple

Fu Yuan was Fu Hua's disciple and Su Mei's junior disciple brother. As a child, he idolized Su Mei, trusted her despite her fearsome reputation, and was notably terrified of thunder. Su Mei nevertheless comforted him during storms, even allowing him to sleep in her room when he was too frightened to be alone. 6 112

He initially followed the principle of protecting all living beings. That conviction was shattered after Su Mei revealed that she had killed hundreds of villagers while exterminating demon beasts, then forced him to choose between his ideals and protecting her. Fu Yuan chose Su Mei, breaking his Dao Heart. 113

His collapse led to Demonic Possession and the awakening of Restraint's Herrscher nature. Although Fu Hua prepared to kill him under sect rules, Fu Yuan stabilized the Honkai-corrupted Su Mei and returned to his original form. 114 115

Later, Su Mei and the senior disciples betrayed both Fu Hua and Fu Yuan. After being stabbed with the renamed Xuanyuan Sword, Fu Yuan used Yu Du Chen to exchange memories for vitality and combat power, defeated his fellow disciples, and forgave them rather than taking revenge. 46 116

Schicksal and St. Freya Academy

Schicksal records list Fu Yuan as an S-rank individual codenamed Restraint and Banished Immortal, with a joining date of 1483 AD. His file contains almost no information beyond his rank, age, and a “Harmless” danger assessment. 120

In 2013, Theresa recruited the initially naive Fu Yuan into St. Freya Academy in exchange for food and accommodation. His Stigmata was soon examined and commercialized as the “Fu Yuan Brand Stigmata,” while he later became an officially commissioned S-rank Valkyrie. 120 123

Appearance

Fu Yuan's appearance changes with his Spirit Core and emotional state. His usual Saber manifestation is a petite, fair-skinned boy with a delicate face, while his alternate forms range from a 165 cm chain-wielding manifestation to a 178 cm adult form. 1 2 5 36

• Baseline Saber height and weight: 158 cm / 43 kg. 1
• His 165 cm Restraint form wears a short white robe, golden chains around his body, and manifests golden chains and a spear behind him. 5
• His Herrscher state can form chains into a throne; his right eye becomes gold with a cross-shaped mark, while his left eye becomes crimson. 127
• His original eye color is black. 23 115

Personality

Fu Yuan alternates between childish playfulness and intense seriousness. He enjoys showing off sword poses, inventing grandiose titles, and acting smug over his Noble Phantasms, but becomes focused when protecting people or confronting threats. 3 14 33

He is deeply affected by his fractured memories, past betrayals, and fear of change. His desire to live freely conflicts with the burdens placed on him by his power and history. 17 20 46

Although he can be casually indifferent due to his overwhelming strength, he is protective toward children and people he considers family. He takes in Shirou, reassures Sakura that he will not abandon her again, and provides care to Fujino and Sakura. 28 47 59 98

Abilities & Skills

Stigmata and Spirit Core

Fu Yuan's Stigmata supports healing, transformation, perception, and access to his different Spirit Core states.

• He used the circulating Stigmata to treat Kiritsugu Emiya's injuries. 2
• His Heroic Spirit Spirit Core was split into three equal parts because it could not fully bear his power. 17
• Emotion Perception allows him to sense others' emotional states, though it is unavailable in some forms. 20 112
• His Stigmata can suppress his demonic features and restore his black eyes and Taoist robes. 23

Swordsmanship and Void Sword Qi

Fu Yuan is an exceptionally skilled swordsman with a history of attaining the Tai Xu sword realms, including Still Water, Clear Mirror, and Sword Heart Illumination. 34

• He can manifest the A-rank Xuanyuan Sword: Unrivaled as paired black and white swords. 3
• He taught Shirou Void Sword Qi and created a high-quality replica of the Xuanyuan Sword for him. 66
• His swordsmanship became flashy and less lethal during his Herrscher period, prompting Fu Hua to correct his style. 84
• His extreme swordsmanship grants a passive C-rank Presence Concealment. 47

Restraint and Chains

As Restraint, Fu Yuan can manifest and command golden chains for offense, defense, and sealing.

• The chains protected him during his battle with Touko Aozaki. 19
• They can autonomously block sword thrusts and form a throne in his Herrscher state. 127
• His Divine Grace Barrier, Inch Punch, and chains allowed him to overwhelm Aozaki and Touko while draining their magical energy. 19

Magecraft

Fu Yuan has broad magecraft knowledge and unusually abundant magical energy.

• Suggestion Sorcery — Alters perception and emotions; he used it at an airport, on the Einzbern household, and to secure cooperation from others. 5 31 47
• Projection Magecraft — Copies objects such as textbooks and assists in material reconstruction. 86 100
• Third Magic — Lets him manifest the Greater Grail ahead of time and refine materials by reducing or erasing their flaws. 68 100
• Magic Resistance (EX) — Nearly all sorcery becomes ineffective under his absolute mystical suppression. 47

Soul Materialization

Fu Yuan's Soul Materialization is ranked EX and is based on an immortal, infinite soul that drives his body with effectively inexhaustible energy. 47

Yu Du Chen

Yu Du Chen's primary rated power exchanges Fu Yuan's memories for vitality and combat power.

• He used it after his senses were stolen and his body was severely restrained. 46 116
• Its use allowed him to defeat his senior disciples, but caused his memories to fade and intensified his fear of living. 46

Equipment / Weapons / Items

• Xuanyuan Sword: Unrivaled — A-rank paired Noble Phantasm consisting of a black sword and a white sword. 3
• Lian Su — The Xuanyuan Sword after Su Mei engraved her name upon it; it was later broken by Fu Yuan during their confrontation. 17 116
• Heavenly Fire — A powerful sword capable of its “Unsheathe” release; using its zeroth-rated power burns Fu Yuan's nerves. 14 36
• Yu Du Chen — Artifact that trades memories for life force and combat power. 46
• Fu Yuan's Diary — A Noble Phantasm used to record experiences; it can be returned to his Spirit Core. 17
• Fu Yuan's Magic Fan — An E-rank Noble Phantasm created in roughly three minutes for magical tricks and combat deception. 33 34

Relationships

• Fu Hua — Master and former guardian figure. Fu Yuan calls her “Master” and seeks her approval, though they have also faced one another as potential enemies after his Demonic Possession. 2 23 114
• Su Mei — Senior Sister. Fu Yuan was fiercely devoted to her, shared a Spirit Core and linked memories with her, endured her betrayal, and ultimately forgave her. 17 23 113 116
• Kiritsugu Emiya — Master during the Fourth Holy Grail War. Their relationship is marked by mutual frustration, but Fu Yuan treats his injuries and follows his commands as Saber. 1 2 8
• Irisviel von Einzbern — Companion and caretaker during the Fourth Holy Grail War; she places increasing trust in Fu Yuan and worries about his condition. 5 20
• Illyasviel von Einzbern — A child who admires Fu Yuan's swordsmanship and calls him “Big Brother.” 4
• Shirou Emiya — Adopted younger brother. Fu Yuan offers him a home, later accompanies him to school, and remains protective of him. 47 59
• Sakura Matou — A girl Fu Yuan helped and promised not to abandon; he introduces her to Shirou as a little sister. 17 59
• Theresa Apocalypse — Recruited Fu Yuan into St. Freya Academy and acted as his caretaker despite remaining wary of his power. 120 123 126
• Murata Himeko — Mentor figure at St. Freya who helped guide Fu Yuan during his Valkyrie period. 123 124
• Hiyori Maru — Close companion whom Fu Yuan dotes on; their shared lack of a conventional past creates a relationship of mutual dependence. 107 108 126

Story Role / Major Arcs

Fourth Holy Grail War

Fu Yuan is summoned as Kiritsugu Emiya's Saber for the Fourth Holy Grail War. He quickly establishes himself as an anomalous Servant whose identity cannot be found in conventional records, while his unstable Spirit Core repeatedly changes his body and disposition. 1 2 5

He fights or confronts Diarmuid, Lancelot, Gilgamesh, the Matou family, and the Aozakis. He eventually declares Fuyuki to be under his protection. 6 14 19 28 54

Life with Shirou

After the war, Fu Yuan meets orphaned Shirou in a hospital and offers to live with him. The two move into the Tohsaka residence, and Fu Yuan later treats Sakura as family as well. 47 48 59

Greater Grail and school period

Fu Yuan obtains the Third Magic through the Greater Grail, absorbs a vast quantity of knowledge from it, and suffers severe mental exhaustion. He later attends school with Fu Hua and others, using projection magecraft and Suggestion Sorcery to support their daily life. 68 70 86 87

Singularity conflict

During a Singularity, Fu Yuan defeats Red A and Artoria with a single spear thrust before effortlessly defeating the Beast Gaeia. His participation is motivated by his contract with Shirou rather than concern for humanity's fate. 105 106

Return to his parents

After discarding his Destiny Points and Eternal Memory, Fu Yuan confirms that his parents are alive. When confronted by the Imaginary Tree and the Sea of Quanta, he collapses the dimension and chooses to remain with his family. 109

Notable Quotes

“I forgive you all.” 46

“I'm back! Master.” 23

“Of course! I'm Schicksal's strongest!” 39