Lee Yoonsung

Lee Yoonsung is an Eastern-born magician who recreated his family's Fairy Dance through magic after being born unable to use aura. The soul fragment preserved in his original Battle Song becomes Theodore Miller's martial mentor, returns to the Baekun Mountains through him, and turns a life defined by rejection into a lasting magical and martial inheritance.

Biography

Academy, Magic Contest, and National Service

The historical Lee Yoonsung was born into the Fairy Dance Lee family, the protectors of the Baekun Mountains, with the social position of a prospective successor but a body unable to use aura. Once that condition was discovered, his family removed him from its register and isolated him in a mountain hut. He refused to accept that imposed fate. After months of preparation, he left at fifteen, survived a dangerous continental crossing with jewels stolen from the family, and reached Meltor to pursue magic instead. (Chapter 57)

In Meltor, Lee found a teacher, entered a magic tower, and spent twenty years translating the remembered principles of Fairy Dance into Battle Song. The spell circulated magic through the body in time with the heartbeat, reproducing the aura flow that his birth had denied him. He eventually returned to Baekun Mountain to prove his worth and defeated the clan's leading practitioners, but his father condemned him for “selling” himself to magic. A later family account establishes that this defeat discredited the sixth head and helped begin a century-long succession schism, making Lee's personal act of vindication consequential far beyond his own lifetime. (Chapters 57 and 243)

The work also destroyed Lee's health: failed attempts could tear muscles and damage internal organs, and he was already near death by the time Battle Song was complete. He died in Meltor believing that neither his family nor his unfinished magic had acknowledged him. What Gluttony later calls through the consumed original book is therefore not the living historical man but a preserved soul fragment. During Synchro, that fragment accepts contact with Theodore, demonstrates the complete system, and leaves him its proficiency and physical experience; Gluttony's result restores Battle Song to a perfect state in Theodore rather than reviving Lee's original body. (Chapter 57)

Elvenheim, Kargas, and the Pirate Archipelago

When Theodore investigates Gluttony's fourth-stage Transmission function in the Pirate Archipelago, Lee's preserved fragment becomes an active participant rather than merely a memory viewed during Synchro. Gluttony explains that direct soul mixing is dangerous and that Transmission instead gives an original-book author a Quest based on an unresolved desire. Theodore chooses Lee first because his high Battle Song proficiency should make the transfer efficient and because he hopes to gain the deeper martial “Hidden Meaning” he has recently encountered. (Chapters 143–144)

The summoned Lee appears in Theodore's mental space as a distinct Eastern man who remembers their earlier meeting and welcomes him. He understands that a completed Transmission will end the fragment's remaining existence, yet he does not bargain for power or status. His stated regret is simply the wish to return to his birthplace in the Baekun Mountains. Although the journey would require crossing half a continent, Lee initially tells Theodore to abandon the request if it would burden the living, showing that homesickness has not displaced his concern for his successor. (Chapter 144)

Theodore promises to carry him home because Lee's Battle Song and inherited physical abilities have already helped keep him alive. Lee accepts the promise with a bow, and the Quest remains pending rather than immediately dissolving him into Theodore. This agreement defines their later relationship: Lee retains a separable voice, will, and unfulfilled purpose inside Gluttony's system, while Theodore becomes the living agent capable of resolving it. Transmission is thus a future exchange conditioned on Lee's return, not evidence that Theodore already possesses Lee's full soul or identity at this point. (Chapter 144)

East Continent and the Northern War

Dimensional displacement eventually brings Theodore to Baekun Mountain, where Lee Seol shelters him and explains the clan's century of division. Lee listens through Theodore and learns that his old victory had helped destabilize the succession. When Theodore lends him control without using Overwrite, Lee performs the forgotten Fairy Dance in Theodore's trained body, recognizes Lee Seol's devotion as keeper, and openly praises her. Theodore then presents himself as Lee's descendant and promises to end the clan dispute, allowing the fragment to stand on his native ground again without confusing Theodore's borrowed body with Lee's historical body. (Chapter 243)

During Theodore's recovery, Lee teaches him for three hours each day. He explains Fairy Dance as a system of flow and softness whose four hidden techniques build upon one another, then supplies the formal movements and principles Theodore lacks. The training improves Theodore's physical ability and mana control, but Lee's instruction does not grant instant mastery: Theodore still has to turn knowledge into proficiency through practice. This distinction matters because the later close-combat applications belong to Theodore's own trained body and magic, even when their framework and recorded experience originate with Lee. (Chapters 244–246)

In the clan's duel trial, Lee again takes the lead through Theodore's body after Theodore has learned from exchanges with Lee Joonyoung. He demonstrates Moon Breaking through the Clouds, counters Fierce Wind and Rain, and uses the lost Boundary of Heaven and Earth to settle the contest without killing his descendant. The possession without Overwrite consumes the fragment's remaining strength, but Lee chooses to finish the technique so both Theodore and the clan can witness it. Satisfied that he has met a worthy descendant, learned his family's condition, and found a disciple, he thanks Theodore and lets his individual ego disappear. Gluttony then confirms the object's disappearance and transmits Lee's memories and experience. (Chapters 246–247)

Lee's consequence persists after his voice is gone. Theodore navigates the mountains through Lee's transmitted memories, applies Fairy Dance and Lee's ether-based substitute for aura in later warfare, and eventually produces Grand Cross, a transcendent technique explicitly described as reaching beyond the martial teacher who supplied his foundation. Lee Joonyoung's later rise as the clan's backbone is likewise associated with Lee's teaching. The Akashic reconstruction near the end of the corpus rebuilds Theodore Miller after Theodore's own ego is destroyed; it does not present Lee as a separately restored personality. That event therefore does not reverse the fragment's disappearance or turn Theodore's later techniques into actions by a revived Lee Yoonsung. (Chapters 252, 273, 356, 376, and 394–395)

Appearance and personality

Lee's independent manifestation in Theodore's mental space has recognizably Eastern features, but the corpus does not establish a detailed build, clothing set, eye color, or other stable physical profile for his historical body. Scenes in which he fights on Baekun Mountain use Theodore's body and should not be read as descriptions of Lee's original appearance. His expressions are more consistently described: he smiles warmly when reunited with Theodore, speaks calmly about his own death, and becomes bitter or forceful when confronting the rejection attached to his family history. (Chapters 57, 144, and 243–247)

His dominant traits are perseverance, gratitude, pride in hard-won skill, and an unresolved attachment to home. He crosses a continent rather than accept his family's judgment, spends decades building a magical answer to an aura-based inheritance, and returns once to demand recognition. As a fragment, however, he repeatedly minimizes his own needs, thanks Theodore for preserving his work, and refuses to make a dead man's regret an absolute burden. His severity toward the clan's decline coexists with tenderness toward Lee Seol and a teacher's insistence that Theodore practice rather than mistake transferred knowledge for achievement. (Chapters 57, 144, and 243–247)

Magic, abilities, and martial skills

Lee's defining achievement is the conversion of an aura-based family discipline into a system a magician can execute. The corpus presents him as unable to use aura but exceptionally talented in magic, eventually crossing the wall of the 7th Circle despite lacking elemental-magic aptitude. His surviving fragment can demonstrate and teach that system through Theodore, while Theodore's later innovations and transcendent applications remain the successor's accomplishments rather than retroactive feats by Lee. (Chapters 57 and 244–247)

Battle Song

Battle Song is the unique body-enhancement magic Lee develops from his childhood memory of Fairy Dance's aura circulation. It drives magic from the circles through the body in rhythm with the heartbeat, turning movement into a forceful “song” and allowing Lee to reproduce martial effects that his aura-less constitution should have barred. The result bridges magic and martial arts rather than granting conventional aura. Its development takes twenty years, and its physical price is severe: an error can rupture muscles or organs, while Lee's repeated experimentation leaves him close to death. (Chapter 57)

The original version also contains what Lee calls unnecessary elements added out of guilt toward his family. When Gluttony consumes his original book, the high Synchro rate lets the fragment demonstrate the intended complete form. Gluttony then reports that Battle Song has been restored to a perfect state and converts Lee's experience into Theodore's proficiency. Subsequent uses of Battle Song, Last Requiem, and its tempo-based movements are Theodore's use of an inherited spell; Lee supplies the design and embodied record, but he is not continuously controlling every activation. (Chapters 57–60 and 75–76)

Fairy Dance and ether

Fairy Dance does not sharply separate attack, defense, advance, retreat, and evasion. Its movements redirect flow, link one action into the next, and combine the softness of moving clouds and water with sudden force. Lee identifies four major hidden techniques: Moon Breaking through the Clouds, Rain like an Axle, Fierce Wind and Rain, and Boundary of Heaven and Earth. The first creates a haze-like net that distorts distance, deflects attacks, and opens a counter; the second uses repeated, penetrating strikes; the third builds on the earlier cloud and rain forms; and the fourth is the lost culmination that only a true successor could use. (Chapters 243–247)

Because Lee cannot use aura, he recreates the clan's techniques through exquisite magic-power control. Theodore later identifies ether as the aura substitute Lee accomplished: it is denser and transformable, but inefficient because it cannot be converted back into magic power. Lee can use Theodore's magic and trained body to display his forms with lethal force, yet even his direct teaching gives Theodore only a framework until combat and repetition create real proficiency. Boundary of Heaven and Earth also hastens the fragment's collapse when used through Theodore, demonstrating that the surviving soul cannot indefinitely substitute for a living martial body. (Chapters 244–247)

Synchro, Transmission, and inherited records

Three states of Lee must be kept separate. The historical Lee is the dead magician who wrote Battle Song. Synchro lets Theodore experience a preserved scene and receive proficiency from the soul fragment in the original book. Transmission later calls that fragment as a continuing ego, assigns its return-home Quest, and—only after Lee exhausts himself and the Quest is completed—converts his memories and experience into Theodore's records. Gluttony's explicit confirmation of the “object fragment” disappearing marks the end of Lee as an active internal speaker. (Chapters 57, 143–144, and 247)

Afterward, Theodore can recall Lee's geography, use Fairy Dance, refine ether, and surpass Lee's known martial limit without the vanished fragment taking control. This is inherited knowledge developed by a different person, not Lee's survival under a new name. Likewise, the investigators in the Akashic Records reconstruct Theodore after his soul is shattered and leave him with a fragment of Akashic authority; the reconstructed person is identified as Theodore, and Lee is not shown among the participating Akashic personalities. Nothing in that sequence establishes a second Lee Yoonsung or restores the Transmission fragment. (Chapters 252, 273, 376, and 394–395)

Power progression

Relationships

• Theodore Miller: Theodore first receives Lee's completed Battle Song through Synchro, then promises the surviving fragment a return to Baekun Mountain. Lee becomes his direct martial teacher, uses Theodore's body to preserve lost clan techniques, and entrusts him with all remaining memories and experience. Theodore, in turn, treats Lee as a senior whose wishes and identity matter rather than as a disposable store of power. (Chapters 57, 143–144, and 243–247)
• Lee Seol: Lee recognizes the young keeper as a descendant who has protected both the mountain and the family despite factional pressure. Her conduct softens his resentment, and her existence helps convince him that his family still has a future worth preserving. (Chapter 243)
• Gluttony: Gluttony preserves Lee's soul fragment through the original book's record, mediates both Synchro and the return-home Quest, and finally converts Lee's memories and experience into Theodore after confirming the fragment's disappearance. Lee acts within that system but retains his own consent, voice, and desire until the Quest ends. (Chapters 57, 143–144, and 247)
• Fairy Dance Lee family: The clan rejects Lee for his inability to use aura, then fractures after his magical recreation of its art defeats its head. On his posthumous return, Lee remains angry at the decline but uses his last strength to preserve its missing techniques and support a more legitimate settlement among his descendants. (Chapters 57 and 243–247)

Items

• Battle Song original book: Lee's original magic text preserves a fragment of his soul and carries the incomplete form of his unique spell. Gluttony consumes the physical book, permanently removing that copy while using its record for Synchro, the later Transmission Quest, and Theodore's inheritance. (Chapters 57 and 143–144)