Xiao Yu

Biodata

Feature	Information
Name	Xiao Yu (萧羽)
Alias(es)	Young Master; Young Hall Master; Hall Master; Regent Xiao Yu 24 76 323
Species/Race	Human; transmigrated soul inhabiting the body of an orphaned child 1
Gender	Male
Affiliation	Nine Stars Hall; Nine Stars Academy; Heaven Dou Empire
Occupation/Role	Founder and Hall Master of Nine Stars Hall; leader of the Nine Stars Academy team; Regent of the Heaven Dou Empire 19 99 323
Martial Soul(s)	Underworld Apostle, later evolved into the Underworld Monarch; Death Scythe 4 196 301
Status	Active; Regent of Heaven Dou 323
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Level 10 / Innate Full Soul Power	4	Awakened the Underworld Apostle Martial Soul, manifesting black wings, black armor, pale-green eyes, and the Underworld Sword. 4
Level 12	5	Absorbed the Hell Twin-Headed Dog’s spirit ring and gained Purgatory Body Protection. 5
Spirit Master	6	Broke through after completing a Black-level task. 6
Soul Elder	18	Had already entered the Soul Elder realm; his third ring granted Gale Piercing Shadow. 18
Level 40	32	Reached the fourth-ring bottleneck, triggering the task to absorb a Ten Thousand Year Spirit Ring. 32
Level 43	42	Absorbed a Ten Thousand Year Tyrant Dragon ring and acquired Underworld Sword Thousand Decisive Strikes. 42
Level 61 / Soul Emperor	57	Became a six-ring Soul Emperor at age seventeen, aided by a Hundred Thousand Year Soul Bone. 57
Level 66	138	Recorded as a nineteen-year-old six-ring Soul Emperor with an extraordinary ring configuration. 138
Level 70	196	Broke through the Spirit Sage threshold; his martial soul evolved into the Underworld Monarch. 196
Spirit Sage	209	Manifested seven rings and used Martial Soul Avatar, elevating his combat strength to the Super Douluo level. 209
Level 80 / Soul Douluo	222	Used the Rampaging Bone Dragon King as a whetstone and broke through during battle. 222
Level 88	231	Reached Rank 88 while traveling through the Netherworld. 231
Middle Level 93 / Titled Douluo	251	Refined the Rampaging Bone Dragon King’s Inner Core into a Ferocious Beast Spirit Ring, officially becoming a Titled Douluo. 251
Level 99 / Quasi-God	310	Revealed Level 99 Soul Power and a complete set of Ten Thousand Year rings for his Death Scythe Martial Soul. 310

Background / History

Xiao Yu was originally a man in his twenties who had read Douluo Dalu in his previous life. After transmigrating, he awakened in the body of a four-year-old orphan in the Sylvia Kingdom, located in the far northwest of the Heaven Dou Empire. With knowledge of future events and the dangers posed by major factions, he began physical training years before his martial soul awakening. 1

The Sanctuary System later bound to him, enabling character summons, Diamond-based exchanges, and the granting of a martial soul. He initially avoided exposing his Innate Full Soul Power to Spirit Hall, considering secrecy essential while he lacked the strength to protect himself. 2 4

After awakening the Underworld Apostle, Xiao Yu hunted his first spirit ring with Miao and entered Bright Mirror Soul Master Academy. He concealed parts of his talent at enrollment, defeated Elite Class Two’s strongest student Zhu Wang, and eventually graduated as the academy’s foremost student. 5 7 11 17

Following graduation, Xiao Yu gathered summoned powerhouses and established Nine Stars Hall in a mountain range northwest of the Sylvia Kingdom. He secured territory and funding by destroying the criminal Dragon Peak Sect, then built the organization through Soul Tool production, recruitment, academy development, and political alliances. 18 19 21

Nine Stars Hall expanded into Heaven Dou City after Xiao Yu obtained the Ice and Fire Yin Yang Well. His subsequent rise brought him into direct conflict with the Blue Lightning Tyrant Dragon Clan, the Heaven Dou royal family, Spirit Hall, Tang San, and the Seven Treasure Glazed Tile Sect. 42 52 60 99

In the Netherworld and City of Slaughter, Xiao Yu pursued increasingly dangerous opponents to refine his combat abilities. He defeated Tang Chen, claimed the title of King of Slaughter, took the Asura Demonic Sword, and later refined the Rampaging Bone Dragon King’s Inner Core into his ninth spirit ring. 222 246 251

Appearance

At eleven years old, Xiao Yu was already over 1.8 meters tall, with a sturdy, well-proportioned build, sword-like brows, starry eyes, and refined features. 17

• During Underworld Apostle possession, he manifests pitch-black armor, black wings, pale-green eyes, and the Underworld Sword. 4
• After his martial soul evolved, he could manifest two pairs of black wings extending over three meters. 209
• His Underworld Monarch form emits a sacred yet oppressive darkness that can compel Netherworld creatures to instinctively bow. 209

Personality

Xiao Yu is cautious, calculating, and highly conscious of political risk. As a child, he concealed his innate talent from Spirit Hall, used ring-disguising tools to hide abnormal spirit-ring configurations, and refused to let Nine Stars Hall be annexed by any outside power. 4 13 55

He is ambitious and plans years ahead, pursuing an independent academy, a powerful sect, commercial influence through Soul Tools, and ultimately continental authority. He treats alliances as strategic assets, but also gives practical support to people he values, including Ye Lingling, Huo Wu, Qian Renxue, and his disciples. 16 57 84

Xiao Yu can be compassionate in limited circumstances: he prevents Miao from slaughtering unsuitable spirit beasts and spares Shui Bing’er and Xue Wu after defeating their Martial Soul Fusion Skill. 5 151 However, he is merciless toward enemies and threats to his interests, brutally defeating Tang San, coercing Xiao Wu for information, and overthrowing Tang Chen to seize control of the City of Slaughter. 60 185 246

Abilities & Skills

Underworld Monarch Martial Soul

Xiao Yu’s original Underworld Apostle Martial Soul evolved into the Underworld Monarch after he reached Level 70. Its manifestation combines flight, darkness, sword techniques, and authority over Netherworld forces. 4 196 209

• Underworld Sword — An innate black longsword used for high-speed sword strikes, sword intent, and spirit-skill execution. 4 151
• Martial Soul Avatar — Amplifies his already exceptional martial soul, raising his combat power to the Super Douluo level. 209
• Underworld God Domain — A darkness domain spanning nearly one thousand meters, releasing killing intent and suppressing opponents within its range. 209
• Underworld King Power — Supreme Netherworld authority capable of suppressing Dark Element power and forcing lesser undead to submit. 218

Spirit Skill Arsenal

Xiao Yu possesses a ring configuration far beyond ordinary age limits, including a Thousand Year second ring, a Ten Thousand Year fourth ring, and later multiple Hundred Thousand Year rings. 138 209

• First Spirit Skill — Purgatory Body Protection: Creates high-temperature flames around his body while increasing attack and defense by 30%. 5
• Third Spirit Skill — Gale Piercing Shadow: Raises his speed by 50% for a straight-line burst attack; its direct trajectory makes agile opponents harder to hit. 18
• Fourth Spirit Skill — Underworld Sword Thousand Decisive Strikes: Generates a barrage of sword phantoms capable of suppressing Shui Bing’er and Xue Wu’s Martial Soul Fusion Skill. 42 150
• Fifth Spirit Skill — Underworld God Destruction: A powerful sword-based destructive attack that can be amplified through Ring Fusion. 150
• Eighth Spirit Skill — Death Space: Creates a spatial prison of bottomless darkness to trap opponents. 236
• Ninth Spirit Skill — Underworld God Descent: Summons an immense Underworld Monarch phantom and increases in power alongside Xiao Yu’s cultivation. 325

Soul Bones

Xiao Yu’s Hundred Thousand Year Soul Bones substantially enhance his cultivation, physical durability, mobility, defense, and spiritual attacks. 57 135

• Underworld Dragon Head Spirit Bone — Helped him attain Soul Emperor rank at seventeen. 57
• Mind Imprisonment — A Hundred Thousand Year head-bone skill that stuns a target’s Sea of Consciousness for roughly three seconds. 209
• Death Gaze — A spiritual Soul Bone skill used to counter Qian Renxue’s Angel’s Roar. 164
• Netherworld Emperor’s Protection — A torso-bone defensive barrier capable of resisting high-level attacks. 218 275
• Underworld King Sacred Body — Enhances Xiao Yu’s body and suppresses an opponent’s spirit. 222
• Teleportation — A right-leg-bone skill used to instantly close distance on Light Feather Douluo. 275

Sword Intent and Ring Fusion

Xiao Yu combines exceptional sword intent with rapid analysis of other spirit masters’ techniques. His sword intent was compared to Sword Douluo Chen Xin’s, while his Ring Fusion was learned after observing Huo Wu use the technique. 150 222

• Ring Fusion — Simultaneously releases the Soul Power stored in multiple rings to greatly amplify one spirit skill. 150
• Single-sword offense — Split the Ice Phoenix created by Shui Bing’er and Xue Wu’s Martial Soul Fusion Skill with one strike. 151
• Adaptive combat — Identified his overreliance on raw Soul Power and entered seclusion to improve his mastery of spirit skills. 82

Death Scythe Martial Soul

The Death God condensed the Death Scythe as Xiao Yu’s second martial soul before dissipating. By Level 99, Xiao Yu had resolved the dangers of Twin Martial Soul cultivation and equipped the Death Scythe with a full set of Ten Thousand Year spirit rings. 301 310

Equipment / Weapons / Items

• Sanctuary System — Grants tasks, Diamonds, item exchanges, martial souls, and summoning cards for characters drawn from Saint Seiya. 2
• Immortal Herb Compendium — Exchanged for 500 Diamonds to identify and secure Immortal Herbs. 18
• Vast Sea Cosmic Shroud — Provides invisibility and allows safer rest and meditation in the Netherworld. 202
• Asura Demonic Sword — Seized from the City of Slaughter after Xiao Yu expelled the Asura God’s divine power from it. 246
• Soul Tools — Nine Stars Hall mass-produces offensive and defensive Soul Tools under Xiao Yu’s direction. 35

Relationships

• Ye Lingling — Childhood classmate, trusted companion, and romantic partner. Xiao Yu aided her studies, sought to resolve the Nine Hearted Begonia’s inherited flaw, and supported her cultivation. 12 76 81
• Huo Wu — Initially a competitive acquaintance from Blazing Academy who became Xiao Yu’s romantic partner. Their relationship is marked by teasing, jealousy, and mutual concern. 16 75 213
• Qian Renxue — Political ally, Martial Soul Fusion partner, and romantic partner. Their cooperation evolved from guarded negotiations into a shared plan to reshape the continent’s political order. 55 164 283
• Miao — Early summoned protector and intelligence specialist. His Demon Butterfly abilities support surveillance and information gathering. 3 57
• Hui Huo — Soul Douluo-level Underworld Fighter summoned as one of Xiao Yu’s first major protectors. 6
• Mu of Aries — Titled Douluo-level summon who serves as a major advisor and pillar of Nine Stars Hall. 18 19
• Dugu Bo — Recruited ally whose relationship with Xiao Yu began through negotiations surrounding the Ice and Fire Yin Yang Well. 37 52
• Tang San — Major antagonist. Xiao Yu repeatedly defeats, undermines, and obstructs Tang San’s opportunities. 60 125 310
• Xiao Wu — Captive Hundred Thousand Year soul beast whom Xiao Yu coerces into revealing information about powerful spirit beasts. 185
• Tang Chen — Former King of Slaughter whom Xiao Yu defeats, replacing as ruler of the City of Slaughter. 246
• Qian Daoliu — Qian Renxue’s grandfather and a supporter of the Nine Stars Hall partnership, warning Bibi Dong against acting against Xiao Yu’s faction. 99

Story Role / Major Arcs

• Transmigration and Awakening — Arrives in the Sylvia Kingdom, prepares for martial soul awakening, gains the Sanctuary System, and awakens Innate Full Soul Power. 1 2 4
• Academy Years — Enrolls at Bright Mirror Soul Master Academy, defeats Zhu Wang, befriends Ye Lingling, and graduates as the academy’s strongest student. 7 11 17
• Founding Nine Stars Hall — Summons his core forces, establishes a sect, destroys the Dragon Peak Sect, and begins developing Soul Tools. 18 19 21
• Heaven Dou Expansion — Secures the Ice and Fire Yin Yang Well, recruits allies, opens a Heaven Dou branch, and brings Nine Stars Hall into continental politics. 42 52
• Suotuo City Conflict — Intervenes at the beginning of Tang San’s journey to Suotuo City and overwhelmingly defeats Tang San and Xiao Wu. 57 60
• Spirit Master Competition — Leads Nine Stars Academy to the top of the Heaven Dou division, defeats Feng Xiaotian and Skywater Academy, and overcomes Qian Renxue in the finals. 136 151 164
• Netherworld Expedition — Evolves his martial soul, develops Underworld King Power, and advances through repeated battles against Netherworld creatures. 196 209 222
• City of Slaughter Takeover — Defeats Tang Chen, claims the City of Slaughter, takes the Asura Demonic Sword, and becomes a Titled Douluo. 246 251
• Heaven Dou Regency — Uses Nine Stars Hall’s power to crush a rebellion and is formally appointed Regent by Qian Renxue. 323

Notable Quotes

“Don't mess with me.” 11

“Soul Power Level does not represent everything. Let me show you the gap between us!” 275