Gu Yuejin

Biodata

Feature	Information
Name	Gu Yuejin (古月烬)
Alias(es)	Gu Yue
Gender	Male
Affiliation	Sun Moon Royal Soul Engineer Academy; Mingde Hall; Sun Moon Team
Occupation/Role	Huo Yuhao's master; Martial Soul Department Director; practical-combat instructor; Sun Moon Team leader
First Appearance	Chapter 2

Power Progression

Stage / Realm / Level	Chapter	Notes
Soul Sage, Level 73	3	Displays seven soul rings, including a hundred-thousand-year ring; defeats Tang Ya and Beibei with ease.
Soul Sage, Level 77	29	His academy entrance test records Soul Power Level 77, stunning the examiners.
Eight-ring threshold	45 54	The 190,000-year Blue Silver Emperor's sacrifice raises his second martial soul to the eight-ring threshold; he postpones obtaining the eighth ring until his body adapts.
Soul Douluo, eight rings	59	Absorbs his eighth soul ring with the aid of the Ice Fire Dragon King arm bones and Blue Silver Emperor life origin; manifests eight rings, including two blood-red rings.

Background / History

Gu Yuejin recruited Huo Yuhao after publicly discrediting Tang Ya and Beibei's claims about the Tang Sect. He revealed his Body Martial Soul and seven-ring cultivation to establish his qualifications, after which Huo Yuhao chose him as his master. 2

After leaving the Star Dou Forest with Huo Yuhao, Gu Yuejin revealed the Blue Silver Emperor as his second martial soul. He subsequently intervened against the Titled Douluo Wang Yang to free the Snow Empress, defeating an opponent far above his nominal rank through his domains, enhanced perception, physical strength, and Mental Shock. 3 7

He later entered the Ice and Fire Yin Yang Eyes, subdued its plant-type ferocious beasts through his Bloodline Domain and Martial Soul True Body, and extracted origin essence from the immortal herbs. He also sought the legacies of the Water Dragon King and Fire Dragon King within the springs. 17 19 22

Following his encounter with Jing Hongchen, Gu Yuejin joined the Sun Moon Royal Soul Engineer Academy. He secured core-disciple treatment for Huo Yuhao, became head of martial soul combat instruction and later Martial Soul Department Director, and built a reserve team through demanding practical training. 14 26 33 39

Gu Yuejin developed an interest in Soul Tool technology, studying under and exchanging ideas with Xuan Ziwen. His long-term technological ambitions include Battle Armor: soul-power-resonant exoskeletal equipment intended to combine offense, defense, and continuous evolution. 46 48 66

Personality

Gu Yuejin is blunt, contemptuous of weakness, and willing to humiliate opponents he considers arrogant or fraudulent. His criticism of Tang Ya and Beibei targets both their cultivation and their reliance on Tang San's legacy. 2

Despite this harshness, he is protective of those under his care. He repeatedly invests resources and planning into Huo Yuhao's growth, saves Meng Hongchen and Ye Guyi, and prioritizes his students' safety during the Soul Master Tournament. 10 11 41 76

He is highly pragmatic and patient in pursuit of power. Rather than immediately forcing a breakthrough after reaching the eight-ring threshold, he waits for his body and foundation to stabilize. He also refuses Xu Tianran's recruitment without closing off future cooperation, preserving his independence. 46 53

Abilities & Skills

Body Martial Soul

Gu Yuejin possesses a Body Martial Soul with exceptionally concentrated blood essence and a Golden Grade Second Awakening.

• Its activation produces overwhelming physical and bloodline pressure. 2 17
• His eye-and-brain synergy lets him perceive movements, soul-power flows, and Soul Tool firing patterns in extreme detail. 7
• The second awakening triples his overall attributes. 7
• His Golden Grade Second Awakening draws the attention of Du Busi and the Body Sect. 60 91

Blue Silver Emperor

His second martial soul is the Blue Silver Emperor, supported by an exceptionally pure “first ancestor” bloodline.

• His bloodline can suppress plant-type soul beasts, including a 190,000-year Blue Silver Emperor. 17 43
• Blue Silver Overlord Spear — a single-target burst technique carrying imperial deterrence. 45
• Eternal Forest — an innate domain capable of deflecting Wang Yang's Soul Tool bombardment. 7
• Eternal Forest: Heaven Devourer — a domain-control and sustain skill whose vines devour matter and residual soul power, converting it into energy for Gu Yuejin. 45
• The Blue Silver Emperor's life origin provides sustained healing and supports his soul-ring absorption. 54 59

Bloodline Domain

Gu Yuejin can release a Bloodline Domain that overwhelms nearby plant life and soul beasts.

• It forces the inhabitants of the Ice and Fire Yin Yang Eyes into submission. 17 19
• Its pressure reflects his concentrated blood essence and high-level life force. 17

Water and Fire Dragon King Power

Gu Yuejin obtained power associated with the Water Dragon King and Fire Dragon King.

• His Water Fire Dragon King arm bones allow him to effortlessly defeat Evil Soul Masters, including a Soul Emperor. 41
• The paired arm bones sort and stabilize violent fire-attribute soul power during absorption. 59
• He has employed nascent laws of Destruction and Creation in battle, though these proved insufficient against Du Busi. 63

Soul Tool Research and Battle Armor Design

Though primarily a Soul Master, Gu Yuejin actively studies Soul Tool theory and engineering.

• He proposes a core design concept that could raise instantaneous output power by 30%. 48
• He passed the Level 5 Soul Engineer examination, though he considers rank secondary to practical understanding. 48
• His Battle Armor concept is designed as a “second skin” linked to a Soul Master's martial soul and soul power. 66
• He authorizes limited Battle Armor hand and leg components for use during the tournament, intending to disguise them as unusual martial soul mutations. 91

Strategy and Instruction

Gu Yuejin is an exacting instructor and long-term planner.

• He favors practical combat over classroom theory. 33
• He trains the reserve team through harsh drills, tactical specialization, and targeted recruitment. 39 46
• He plans counters to Shrek Academy's fusion skills and psychological tactics. 76
• He assigns Huo Yuhao covert reconnaissance tasks, including mapping Star Luo City through Spiritual Detection and feeding false intelligence to observers. 83 85

Equipment / Weapons / Items

• Water Fire Dragon King arm bones — grant access to extreme water-and-fire power and aid soul-power stabilization. 41 59
• Hundred-Thousand-Year Blue Silver Emperor Left Leg Bone — received as a system reward after Huo Yuhao's fusion with the Snow Empress. 10
• Sinking Silver — gifted to him by Xu Tianzhen after their encounter in Mingdu. 27
• Battle Armor components — prototype exoskeletal equipment developed through his Soul Tool research. 66 91

Relationships

• Huo Yuhao — disciple. Gu Yuejin recruits, trains, protects, and assigns him critical strategic tasks; Huo Yuhao deeply admires and trusts him. 2 10 83
• Jing Hongchen — ally and academy patron. Jing recruits Gu Yuejin, supports his teaching role, and later backs his tournament plans. 14 26 76
• Meng Hongchen — student and admirer. Gu Yuejin saves her in the Extreme North; she becomes openly infatuated with him, while he remains focused on her cultivation and team role. 11 12 14
• Ye Guyi — rescued recruit. Gu Yuejin saves her from Evil Soul Masters and brings her into the reserve team while concealing the sensitivity of her Holy Angel Martial Soul. 41 46
• Xuan Ziwen — Soul Tool research collaborator. Their shared interest in unconventional Soul Tool theory leads to the Battle Armor Plan. 47 48 66
• Xu Tianran — political suitor and potential rival. Xu Tianran seeks to recruit or control Gu Yuejin; Gu Yuejin maintains a deliberately independent position. 29 53
• Xu Tianzhen — student and princess of the Sun Moon Empire. She develops an interest in Gu Yuejin and joins his reserve team. 27 38 39
• Yang Ke — prospective ally from the Soul Breaking Spear clan. Gu Yuejin aids her family and receives her oath of future service. 92 98

Story Role / Major Arcs

Taking Huo Yuhao as Disciple

Gu Yuejin defeats Tang Ya and Beibei ideologically and physically, then becomes Huo Yuhao's chosen master. He immediately begins redirecting Huo Yuhao's cultivation path away from the Tang Sect. 2 3

Extreme North Expedition

He confronts Wang Yang to free the Snow Empress, manages the subsequent Ice Empress conflict, and helps establish Huo Yuhao's Extreme Ice spirit-soul foundation. During this journey, he also saves Meng Hongchen. 7 10 11

Sun Moon Academy Reforms

Gu Yuejin joins the Sun Moon Royal Soul Engineer Academy, assumes leadership of its Martial Soul Department, and forms a reserve team through uncompromising combat training and tactical restructuring. 26 33 39

Blue Silver Emperor Sacrifice

He locates and subdues a 190,000-year Blue Silver Emperor, negotiates its sacrifice, and obtains the power needed to approach the Soul Douluo realm. 43 45

Soul Douluo Advancement and Body Sect Conflict

After securing his eighth ring, Gu Yuejin reaches Soul Douluo. His Golden Grade Body Martial Soul Second Awakening draws Du Busi's attention, and their clash exposes the gap between Gu Yuejin and a peak Soul Douluo. 59 60 63

Soul Master Tournament Leadership

Gu Yuejin becomes leader of the Sun Moon Team for the tournament. He prepares strategies against Shrek, expands intelligence gathering, and begins deploying Battle Armor components in response to restrictions on Soul Tools. 73 76 83 91

Trivia

• Gu Yuejin claims to value the essence of Soul Tool engineering over formal Soul Engineer rank. 48
• He considers unstable cultivation foundations unacceptable, even when immediate advancement is available. 46
• His stated ultimate ambition is the “supreme throne of a God King.” 46