Yu Xiaogang

Biodata

Background / History

Yu Xiaogang built his reputation around the Ten Core Competencies of Martial Souls, including the maxim that “there are no useless martial souls, only useless soul masters.” His research on Blue Silver Grass relied on 647 commoner soul masters drawn from Martial Soul Hall archives, without investigating regional variants or the plants themselves. 1

At Notting Academy, he identified Tang San’s full innate soul power as evidence of a second, high-quality martial soul and attempted to recruit him as a disciple. When Xu Linjiu challenged both his conclusions and research methods, Yu Xiaogang was unable to rebut him and desperately asserted that Tang San possessed twin martial souls. 1 2

Xu Linjiu’s use of the Miracle Seed revealed that Tang San’s Blue Silver Grass had extraordinary compatibility with life force, suggesting it was a sealed Blue Silver King or Blue Silver Emperor lineage rather than ordinary Blue Silver Grass. The demonstration shattered Yu Xiaogang’s confidence in his own theory. 2

He continued trying to claim Tang San by insisting that only he understood the cultivation risks of twin martial souls. After insulting Xu Linjiu, he was struck and injured by Tang San; witnessing rank-nine Wang Sheng use a self-created soul skill then caused him to faint from shock. 3

Personality

Yu Xiaogang is deeply invested in his reputation as a martial soul theorist. When challenged, he repeatedly falls back on his claimed authority, family background, access to Martial Soul Hall materials, and status as the “wisdom of the Golden Iron Triangle.” 1 10

His desire to find a gifted disciple is tied to proving his theories and overcoming the stigma of his own failed martial soul mutation. He views Tang San as a perfect subject through whom he could validate his work and potentially reach Titled Douluo status. 3 29

Humiliation makes him volatile and vindictive. He insults work-study students, pressures Xiao Wu and Tang San into becoming disciples or research subjects, and later seeks revenge through Shrek Academy. 9 27 However, he intervenes when Xu Linjiu moves against Ma Hongjun, insisting that the latter is still a child. 29

Abilities & Skills

Soul Power

Yu Xiaogang is a rank 29 Grand Soul Master, stalled below rank 30 for many years. His lack of progress prevents him from obtaining a third soul ring. 3 10

• Possessed two yellow soul rings before losing his martial soul connection. 9 10
• His physical body receives little to no enhancement from Luo Sanpao, allowing six-year-old Tang San to injure him when caught off guard. 3
• He is vastly outmatched by Xu Linjiu, first as a Soul Ancestor and later as a Soul King. 10 11 28

Luo Sanpao

Luo Sanpao is Yu Xiaogang’s mutated external and detached martial soul: a purple, pig-like creature with a fat head, oversized ears, and a bump on its head. 3 10

• Fart Like Thunder! Heaven-Shattering Earth-Splitting Luo Sanpao! — after consuming white radishes, Luo Sanpao releases a foul, explosive cloud of gas. 10
• The technique can be reversed by superior psychic power, causing Luo Sanpao to be struck by its own gas. 10
• Xu Linjiu forcibly severed Yu Xiaogang’s connection with Luo Sanpao using Inner Focus. 28
• Afterward, Luo Sanpao no longer recognized Yu Xiaogang as its master and became an ordinary soul beast; Xu Linjiu gave it to Xiao Wu as a pet. 30

Equipment / Items

• Storage soul tool — carried at his waist and used to store items. 10
• White radishes — fed to Luo Sanpao to activate its first soul skill. 10

Relationships

• Tang San — Yu Xiaogang attempted to take Tang San as his disciple and regarded him as the key to proving his theories; Tang San rejected him in favor of Xu Linjiu. 1 3
• Xu Linjiu — rival and primary adversary; Xu Linjiu publicly dismantled Yu Xiaogang’s theories, repeatedly defeated him, and ultimately severed his bond with Luo Sanpao. 1 10 28
• Xiao Wu — after losing Tang San, Yu Xiaogang persistently tried to recruit Xiao Wu as his disciple, repeatedly approaching her at the academy. 9
• Flender — ally from Shrek Academy who acted on Yu Xiaogang’s behalf against Tang San and Xu Linjiu. Yu Xiaogang later blamed himself for involving Flender in the conflict. 27 31
• Ma Hongjun — accompanied Yu Xiaogang to Notting Academy as part of Shrek Academy’s attempt to pressure Tang San; Yu Xiaogang tried to protect him from Xu Linjiu. 27 29
• Luo Sanpao — formerly his detached martial soul and companion; their connection was permanently severed. 28 30
• Blue Lightning Tyrant Dragon Clan — Yu Xiaogang is the son of the clan leader, though he is described as an abandoned son of the clan. 10 20

Story Role / Major Arcs

• Tang San’s recruitment — approaches Tang San at Notting Academy, promotes his twin-martial-soul theory, and attempts to make him a disciple before Xu Linjiu intervenes. 1 3
• Notting Academy conflict — tries to recruit Xiao Wu, disparages work-study students, and challenges Xu Linjiu after Tang San’s martial soul evolution is revealed. 9 10
• Public defeat — attacks through Luo Sanpao, only for Xu Linjiu to reveal his Soul Ancestor cultivation and humiliate him with his own reversed soul skill. 10 11
• Shrek retaliation — returns with Flender and Ma Hongjun to pressure Tang San into joining Shrek Academy as a martial soul theory researcher. 27
• Loss of Luo Sanpao — Xu Linjiu punishes him for repeatedly provoking Tang San and forcibly separates him from his martial soul. 28 30
• Shrek Academy aftermath — accompanies Xu Linjiu to Shrek Academy while carrying Ma Hongjun and expresses guilt over Flender’s defeat. 30 31

Notable Quotes

“Twin martial souls! Right! Twin martial souls! He already admitted it just now. My theory is right! My theory is right!” 1

“Thirty years east of the river, thirty years west of the river—don't bully Gangzi for being poor!” 11

Trivia

• Yu Xiaogang’s Blue Silver Grass research sample consisted of exactly 647 commoner soul masters. 1
• His proclaimed theory that no martial soul is useless is directly contradicted by his own description of Blue Silver Grass as useless. 1
• He initially mistakes Xu Linjiu for an ordinary teacher from a backwater academy, unaware that Xu is a four-ring Soul Ancestor. 10 11