Yu Xiaogang

Biodata

Feature	Details
Name	Yu Xiaogang (玉小刚)
Alias(es)	“Theory-Invincible Master”; “Grandmaster” (title revoked); “Plagiarist · Yu Xiaogang” 5 6
Gender	Male
Affiliation	Former member of the Blue Lightning Tyrant Dragon Clan; former Spirit Hall Special Envoy; member of the Golden Iron Triangle; associated with Blue Tyrant Academy 5 8 9
Occupation/Role	Martial soul theorist and lecturer; tactical commander of the Golden Iron Triangle 5 8
Status	Alive; publicly disgraced, disowned by the Blue Lightning Tyrant Dragon Clan, and subject to a Spirit Hall order for capture alive 9 42
First Appearance	Chapter 1

Background & History

Stolen research and public reputation

Yu Xiaogang built his reputation as the author of the Ten Core Competencies of Martial Soul and presented the work as the product of decades of research. When questioned by a young soul master, he directed the student back to his own text before privately consulting a stolen Blue Lightning Tyrant Dragon Clan research fragment for the answer. 5

The Sky Curtain revealed that Yu stole thirteen clan texts and sold eight on the black market. The Blue Lightning Tyrant Dragon Clan expelled him from its core circle, reduced his allowance, and later confirmed the records publicly. 5

He also received privileged access to Spirit Hall’s Library Pavilion as a Special Envoy. Using a Saintess Token, he borrowed confidential archives forty-seven times over three years; one documented night saw him copy seventeen restricted volumes. 5 6

Relationship with Bibi Dong

Yu initially approached the young Bibi Dong because she possessed Twin Martial Souls, stood to inherit the papacy, and could grant access to Spirit Hall’s knowledge. He repeatedly staged “chance encounters,” cultivated her sympathy, and recorded that maintaining her affection would provide further confidential texts. 7

Bibi Dong trusted him with restricted research on Twin Martial Souls and martial soul mutations. After Qian Xunji opposed their relationship, Yu fled Spirit City with copied documents and without informing Bibi Dong. 7

Golden Iron Triangle and Liu Erlong

After leaving Spirit City, Yu arrived at Blue Tyrant Academy and presented himself to Liu Erlong and Flender as a tragic exile. The three later became the Golden Iron Triangle: Flender provided offense and support, Liu Erlong fought at the front, and Yu directed their tactics from the rear. 7 8

Liu Erlong fell in love with Yu after he planned her training and helped advance her strength. Their wedding was interrupted when Yu Yuanzhen revealed that they were close blood relatives; Yu recoiled, abandoned Liu Erlong before the guests, and fled. 8 26

Liu Erlong waited for him for twenty years. When they reunited, Yu refused to acknowledge her as a partner while accepting her academy’s resources and care, claiming their bond should remain “spiritual.” The Heavenly Dao determined that his abandonment was motivated by fear for his reputation rather than concern for Liu Erlong or clan honor. 8

Personality

Yu initially presents himself as a righteous, selfless scholar. He publicly insists that his research benefits Soul Masters, describes plagiarism as “academic inheritance,” and repeatedly frames self-preservation as service to the greater good. 1 6 9

The Sky Curtain instead depicts him as calculating and evasive. He uses intellectual authority to gain admiration, exploits Bibi Dong’s trust for access to archives, benefits from Liu Erlong’s devotion without accepting responsibility, and retreats when his public standing is threatened. 7 8

Even after his exposure, Yu continues defending Tang San and rejects evidence that contradicts his theories. He insists that future exceptions—such as Triple Martial Souls and a million-year first soul ring—cannot invalidate his principles. 13 41 42

Abilities & Skills

Luo Sanpao

Yu’s martial soul is Luo Sanpao, a malignant mutation of the Blue Lightning Tyrant Dragon martial soul. 5

• Cultivation: Rank 29 Soul Grandmaster; unable to break through further. 5
• Soul rings: Two yellow rings. 5
• Combat assessment: Rated at 60% of an ordinary Rank 28 Soul Grandmaster’s capability. 5
• Limitation: His low cultivation and weak combat ability undermine his authority when instructing higher-ranked Soul Masters. 5

Tactical command

Yu served as the Golden Iron Triangle’s battlefield commander, identifying soul beast weaknesses and directing Flender and Liu Erlong during combat. 8

• Analyzed Flender’s soul-skill timing and warned of vulnerabilities during Soul Power transitions. 8
• Planned Liu Erlong’s training, contributing to her rapid growth and admiration for him. 8
• Operated from the rear rather than as a frontline combatant. 8

Martial soul theory

Yu is publicly known for the Ten Core Competencies of Martial Soul, but the Heavenly Dao’s audit found no original theoretical contribution. 5 6

• Of thirty-seven published papers, thirty-two drew their core content from major factions’ internal documents; the remaining five were common-sense summaries. 5
• His book reportedly overlaps Spirit Hall archives by 92.7%, including copied transcription errors. 6
• He removed the names of earlier researchers, including Cardinal Shen Yuan, and republished their findings under his own name. 6
• Some copied soul-ring absorption methods were experimental procedures with an estimated meridian-rupture and Soul Power-backlash death risk exceeding 80% when applied universally. 6

Equipment & Items

• Saintess Token — Granted the highest level of access within Spirit Hall’s Library Pavilion and allowed Yu to enter restricted archive floors. 6
• Spirit Hall Special Envoy token — Identified him as a Pope Hall-authorized Special Envoy when he entered Spirit Hall’s core library. 5
• Blue Lightning Tyrant Dragon Clan research texts — Yu stole thirteen clan volumes; eight were sold through the black market. 5
• Copied confidential archives and notes — He carried copied Spirit Hall research when fleeing Spirit City. 7

Relationships

• Bibi Dong — Former lover and source of his access to Spirit Hall’s confidential archives. Yu’s manipulation and abandonment of her led Bibi Dong to seek public justice and order his capture. 6 7 9
• Liu Erlong — Former lover and Golden Iron Triangle companion. Yu abandoned her after their blood relationship was revealed, then accepted her support while refusing a real partnership. 8 26
• Flender — Golden Iron Triangle companion and longtime friend. Flender initially defended Yu’s theoretical work, but began doubting him after the theft evidence appeared. 5 8
• Tang San — Student and most vocal defender. Tang San defended Yu’s theories during the Hypocrite Ranking, while Yu later defended Tang San against accusations concerning Xiao Wu. 5 13
• Yu Yuanzhen — Yu’s father and Blue Lightning Tyrant Dragon Clan leader. He first reduced Yu’s standing after the clan-text theft, then publicly removed him from the genealogy and revoked his surname. 5 9 26
• Qian Xunji — Former Pope who opposed Yu’s relationship with Bibi Dong. Yu fled after the confrontation, then wrote Qian Xunji seeking favor and offering to sever his connection to Bibi Dong. 7 9

Exposure and Punishment

Yu was revealed as the second-place entry on the Douluo Continent Hypocrite Rankings. The Sky Curtain’s evidence dismantled his reputation as an original theorist by exposing theft from the Blue Lightning Tyrant Dragon Clan, Spirit Hall, the Star Luo Royal Family, the Clear Sky Sect, and independent scholars. 5 6

The Heavenly Dao formally ruled that Yu’s plagiarism was proven, assessed his original theoretical contribution as zero, revoked his “Grandmaster” title, and replaced it with “Plagiarist · Yu Xiaogang.” 6

After the exposure of his treatment of Bibi Dong and Liu Erlong, the Heavenly Dao erased Yu’s emotional and memory connections to both women, leaving him with an unexplained sense of loss. 8

Bibi Dong subsequently ordered Ghost Douluo and 3,000 Holy Emperor Warriors to capture Yu alive and bring him before Qian Xunji’s mausoleum. At the same time, Yu Yuanzhen severed all clan ties, removed him from the genealogy, and revoked his right to use the Yu surname. Yu collapsed unconscious under the combined condemnation. 9

Later Sky Curtain Appearances

• Yu defended Tang San’s treatment of Xiao Wu, arguing that actions mattered more than intentions. The Heavenly Dao countered with records of Xiao Wu’s sacrifices and Tang San’s tactical simulations. 13
• He rejected the future-era claim that martial souls would cease being the only path to power, insisting that martial soul laws could not change. 33
• The existence of an 800,000-year soul beast and a Rank 99 body-martial-soul user further challenged the limits of his theories. 34 36
• Tang Wutong’s Triple Martial Souls provoked a public breakdown, as Yu insisted such a body should be unable to survive. 41
• Huo Yuhao’s million-year first soul ring contradicted Yu’s stated 423-year first-ring limit, causing Yu to spit blood and collapse. 42

Notable Quotes

“True scholars and gentlemen do not fear Heaven's Mandate judgment. I have studied martial soul theory for decades and have never done anything against my conscience.” 1

“The definitions of theoretical synthesis and original research differ. I have never claimed that all content was independently discovered by me.” 6

“I could only preserve this useful body and study martial soul theory. That was the greatest contribution I could make to the Soul Master world!” 9