Gu Tianxue

Biodata

Feature	Details
Name	Gu Tianxue (古天雪)
Alias(es)	Gu Family Eldest Miss; Tianxue
Gender	Female
Affiliation	Gu Family; administrator of the Ancient Domain and Southern Domain under Lin Yi's reforms 639 695
Occupation/Role	Gu Family leader and martial-arts strategist; later entrusted with governing the two domains in Lin Yi's absence 639 695
Status	Alive; pregnant with Lin Yi's child as of Chapter 695 695
First Appearance	341

Power Progression

Stage / Realm / Level	Chapter	Notes
Non-professional; restricted by Innate Meridian Severance	342	Her constitution initially prevented her from becoming a professional martial artist despite her exceptional martial knowledge.
Half-step Martial Saint	379	Used the Phoenix Heart Fruit, auxiliary spiritual resources, the Legacy Medicine Garden's residual supreme-yang aura, Martial Saint Pills, and the Gu Family's Yin-Yang Bagua Plate to begin a direct breakthrough.
Martial Saint	380	Completed her breakthrough after consuming additional high-grade Martial Saint Pills supplied by Lin Yi; her Innate Meridian Severance was replaced by the Yin-Yang Dao Body.
Martial Saint First Realm—Perfected	407	Refined Red-Orange Light Force supplied by Lin Yi, breaking her Flesh Shackles and perfecting the First Realm.
Eighth-Realm Martial Saint	679	Reached the Eighth Realm shortly before Lin Yi's departure for Starfall Academy.
Strength suppressed in Black Mountain	680	The Black Mountain curse continued targeting Gu Family members, limiting her effectiveness despite her Eighth-Realm cultivation.

Background / History

Gu Tianxue is a direct descendant of the Gu Family, whose “Tian” generation was reputedly decreed by Gu Xianhe to be the clan's most gifted generation. Gu Tianle, the former Gu Family inheritor who became the Wood Sage Spirit, identifies her as his blood descendant and had watched over her because of his bond with her mother. 358

Born with Innate Meridian Severance, Gu Tianxue could not follow the normal martial path. She instead studied the Gu Family's collections from childhood, becoming proficient in external martial arts, Mystic Gate formations, martial theory, and identifying others' cultivation bottlenecks. Her reputation was strong enough that a Martial Saint once lost a debate on martial principles against her. 342

She entered the Black Mountain Secret Realm seeking a means to resolve her constitution and pursue the Martial Saint realm. There, she formed a guarded partnership with Lin Yi while he was operating under Qin Jian's identity. Lin Yi protected her from the secret realm's spatial pressure, gravity curse, and Bone-Eroding Black Wind, while Gu Tianxue provided inherited techniques, formation knowledge, and directions toward the Gu Family's inheritance ground. 360 370 371

In the Legacy Medicine Garden, Gu Tianxue used the Phoenix Heart Fruit and her family's Yin-Yang Bagua Plate to transform her constitution and attempt a direct ascent to Martial Saint. Her breakthrough nearly failed after exhausting her own Martial Saint Pills, but Lin Yi supplied two high-grade pills, allowing her to complete the transformation into the Yin-Yang Dao Body and become a Martial Saint. 379 380

Afterward, her alliance with Lin Yi became a marriage and political partnership. She protected his false identity, assisted his recruitment and intelligence efforts, and eventually received the Gu Family Old Ancestor's trust to manage the family's affairs. When Lin Yi departed for Starfall Academy, he placed the reformed Ancient Domain and Southern Domain under her stewardship. 401 465 639 695

Appearance

Gu Tianxue is noted for her refined, noble appearance, fair complexion, and striking blue eyes. Her appearance became even more remarkable after her Martial Saint breakthrough. 341 391

• Blue eyes described as clear and autumn-water-like. 342 391
• Usually carries herself with the reserved poise expected of the Gu Family's eldest miss. 350 419
• Her frail constitution was visibly affected by Black Mountain's curse before her transformation. 370 379
• After becoming a Martial Saint, she moves with an ethereal Gu Family lightness skill. 380

Personality

Gu Tianxue is proud, sharp-minded, and difficult to deceive. She quickly noticed inconsistencies in “Qin Jian,” deduced that he was simultaneously walking the Three-Ladder Path, and repeatedly investigated his concealed identity rather than accepting his explanations at face value. 341 353

She is also secretive and highly goal-oriented. During the Black Mountain expedition, she withheld much of her purpose and knowledge until cooperation became necessary, bargaining with techniques and information to secure Lin Yi's protection. 345 350 361

Though initially haughty and easily provoked by Lin Yi's teasing, she becomes more trusting and openly supportive over time. She teaches him family techniques when he is injured, worries about his safety and reputation, and accepts major responsibility for the Gu Family and the two domains. 373 418 639 695

Abilities & Skills

Martial Dao Grandmaster

Gu Tianxue possesses the Martial Dao Grandmaster talent, giving her exceptional insight into external martial arts and cultivation.

• Identifies martial bottlenecks and offers guidance to other cultivators. 342
• Recognizes clues in combat techniques and rapidly deduces hidden cultivation methods. 353
• Had mastered numerous white-quality external martial arts before entering Black Mountain. 371
• Activated and directed stone warriors in the inheritance chess trial through her martial knowledge and formation control. 371 372

Mystic Gate Formations and Battlefield Command

Her knowledge of Mystic Gate formations makes her a capable tactical commander.

• Planned the stone-warrior chess trial's formations and adapted them as enemy warriors advanced in strength. 371 372
• Used defensive, ambush, and decapitation tactics to dismantle stronger enemy formations. 372
• Shared Gu Family insights into the Three-Step Fusion Method, though Lin Yi judged those notes as theoretical rather than directly practical. 354

Yin-Yang Constitution

Gu Tianxue originally possessed Innate Meridian Severance, Yin-Yang Dual Cultivation, and Sense Qi to Find Meridian talents. Her constitution changed after refining the Phoenix Heart Fruit. 346 379

• Innate Meridian Severance — originally prevented her from becoming a professional martial artist. 342
• Yin-Yang Dao Body — replaced her former constitution after her Martial Saint breakthrough. 380
• Her special constitution is compatible with dual cultivation and was considered important enough that Grand Saint Granny urged Lin Yi to leave an heir with her. 495 488

Yin-Yang Martial Arts

After becoming a Martial Saint, Gu Tianxue can wield Yin-Yang True Qi in battle.

• Uses the Gu Family's signature lightness skill for rapid, graceful movement. 380
• Manifested an Yin-Yang Giant Hand against a Ji Family Martial Saint. 500
• Received several copied Red Talents from Lin Yi, including Qiankun Yin-Yang Dharma Body, to improve her aptitude for cultivating the Qiankun Yin-Yang Domain. 695

Gu Family Techniques

• Circulating Heaven Qi Art — a Golden External Technique shared with Lin Yi as payment for carrying her through Black Mountain. 361
• Three Saints Unity Art — a Gu Family restorative external skill that nourishes essence, energy, spirit, and breath; she taught it to Lin Yi after his Martial Spirit was destroyed. 373
• Purple-grade archery external skill — provided to Lin Yi in exchange for seeing his true appearance. 373

Limitations

• Black Mountain's curse specifically targets Gu Family members, previously leaving her unable to withstand the secret realm's pressure without Lin Yi's protection. 358 370
• The curse remained potent enough to suppress her even after she reached the Eighth-Realm Martial Saint stage. 680
• Her direct Martial Saint breakthrough placed immense strain on her body because her physical foundation had not transformed alongside her True Qi. 379

Equipment / Weapons / Items

• Yin-Yang Bagua Plate — Gu Family heirloom containing the accumulated True Qi essence of successive Gu Family Martial Saints; it can be used by one who condenses the Yin-Yang Dao Body. 380
• Frost Ruyi — a Martial Dao Spirit Treasure she gifted to Lin Yi at Martial Saint City's gate, along with precious pills. 426
• Phoenix Heart Fruit — consumed during her constitutional transformation and Martial Saint breakthrough. 379

Relationships

• Lin Yi — Initially traveled with him while he used Qin Jian's identity; their guarded alliance became a marriage marked by mutual protection, political cooperation, and eventual parenthood. 360 401 695
• Gu Yan — Her uncle and a longtime guardian; he accompanied her to the Black Mountain Secret Realm and later received a Superior Martial Saint Pill from Lin Yi. 347 515
• Gu Tianle / Wood Sage Spirit — Her blood ancestor, who had secretly watched over her because of his connection to her mother and asked Lin Yi to keep her safe in Black Mountain. 358
• Grand Saint Granny — A close elder who treated Gu Tianxue as her granddaughter and confirmed that her cold-constitution problem had been resolved. 463
• Gu Family Old Ancestor — Entrusted Gu Tianxue with the Gu Family's affairs before entering seclusion. 639
• Xiao He — Her maid, who is fiercely protective of her and suspicious of Lin Yi's behavior under the Qin Jian identity. 341

Story Role / Major Arcs

Black Mountain Secret Realm

Gu Tianxue drives the expedition into Black Mountain because she seeks the spiritual resources and inheritance needed to overcome Innate Meridian Severance. Her knowledge of the Gu Family's legacy and the inheritance trial is essential to reaching the Legacy Medicine Garden. 350 371 379

Martial Saint Breakthrough

She transforms her constitution with the Phoenix Heart Fruit and uses the Gu Family's accumulated Martial Saint True Qi to attempt an unprecedented direct breakthrough. Lin Yi's protection and pills allow her to survive the final stage and emerge as a Martial Saint. 379 380

Gu Family and Tong Pass Politics

Following the Black Mountain expedition, Gu Tianxue helps stabilize Lin Yi's standing in the Ancient Domain, protects his false identity, gathers intelligence, and aids his efforts to recruit powerful families and obtain domain techniques. 401 465

Stewardship of the Two Domains

After the Gu Family Old Ancestor enters seclusion, Gu Tianxue assumes responsibility for the family. Lin Yi later entrusts her with governing the Ancient Domain and Southern Domain while he leaves for Starfall Academy. 639 695

Notable Quotes

“With me here, I won't let your false identity be exposed...” 401

“I have succeeded...” 380