Dan Heng

Biodata

Feature	Details
Name	Dan Heng (丹恒)
Alias(es)	Imbibitor Lunae; Yin Yue Jun; Teng Huang
Species/Race	Sustainer Dragonkin; descendant of Immortals
Gender	Male
Affiliation	Astral Express / Express Crew
Occupation/Role	Express Crew guard and archivist
Status	Active
First Appearance	Chapter 4 (mentioned as an Imprisonment Court prisoner) 4

Power Progression

Stage / Realm / Level	Chapter	Notes
Yin Yue Jun inheritance clarified	261	After accepting rather than resisting his inherited power, Dan Feng's memories and the Dragon Sovereign legacy become clearer; he helps seal Jianmu alongside Bailu and Dan Lei. 261
Earth Seed integration	588, 590	Uses the Earth Seed of Destruction to shape terrain against Long Night Moon, then fully integrates its Immortal Power and activates its data-storage protocol to contain the Memory Tide. 588 590
Mastery of Yin Yue Jun's power	608	Raises the sea level by over thirty meters to submerge Paha Island, eliminate Frenzied Hunt creatures, and precisely spare the Moon Equation Force Experiment Design Bureau. 608
Geo origin and Dragon King Authority	626	Receives a cluster of Teyvat's Geo origin from Azhdaha, improving the Teng Huang form's control over Teyvat's earth and Geo power. 626

Background / History

Dan Heng is an incomplete reincarnation connected to Dan Feng. The Dragon Masters used a secret technique to preserve his past-life memories when he was forcibly made to shed his scales and reincarnate; as a result, he inherited both Dan Feng's legacy and the resentment surrounding Dan Feng's actions. 4 235

He becomes a member of the Express Crew rather than an agent of any Dragonkin legacy. Although his bloodline originates from the Immortal Dragon, he explicitly maintains that his choices are his own and that he serves the Express as its guard and archivist. 605

His return to the Luofu forces him to confront the consequences of Dan Feng's past. He assists in reopening the Scale Abyss Realm, teaches Bailu the Yin Yue Jun inheritance, helps suppress Jianmu's roots, and later performs the forced scale-shedding of Taoran, Xuepu, and Feng Huan under Dan Lei's order. 235 261 263

Appearance

Dan Heng normally appears human, but his Dragon Sovereign transformations reveal his Dragonkin heritage.

• Dragon horns and tail manifest in his Teng Huang form. 623
• Azure Dragon power is associated with large-scale water manipulation and the Cloud Chant Technique. 540 608
• His Yin Yue Jun form is incomplete: his dragon tail is described as a phantom rather than a naturally manifested tail. 588

Personality

Dan Heng is restrained, serious, and reluctant to involve others in unresolved matters from his past. He initially avoids discussing Dan Feng's history with the Express Crew, but later accepts responsibility for the harm associated with that legacy. 147 235

He consistently prioritizes protecting his companions. He accepts dangerous plans to rescue Star and March 7th, endures a prolonged search through the Memory Tide, and treats the risks of the Earth Seed as preferable to abandoning them. 588 590

Though he is wary of his inherited identity, he gradually stops rejecting it. This acceptance strengthens his Dragon Sovereign inheritance without changing his commitment to the Express Crew. 261 605

Abilities & Skills

Cloud Chant Technique

Dan Heng wields the Sustainer Dragonkin's water-controlling art.

• Opens the entire Scale Abyss Realm by reversing its waters. 235
• Cleanses large areas with water-based techniques such as Azure Dragon Cleanses the World. 540
• Raises and directs a tsunami with enough precision to eradicate enemies while leaving a protected facility untouched. 608
• Can use water carrying a more powerful Cloud Chant Technique than his own to recognize Dan Lei's intervention. 579

Yin Yue Jun Inheritance

Dan Heng retains part of Yin Yue Jun's Dragon Sovereign power and secret techniques.

• Channels the Chongyuan Bead while attempting to seal Jianmu. 261
• Works with Bailu and Dan Lei to mobilize the Immortal Dragon power within the Scale Abyss Realm. 261
• Possesses inherited memories and techniques from Dan Feng, though the inheritance was initially incomplete and resisted. 235 261
• His incomplete Dragon Sovereign form limits his ability to fully manifest as the azure dragon described in Dan Feng's memories. 608

Teng Huang Form and Earth Authority

Through the Earth Seed and Azhdaha's aid, Dan Heng gains an earth-aligned Dragon Sovereign form.

• Uses the Earth Seed to generate stalagmites and complex terrain against Long Night Moon. 588
• Creates a special data-storage space through the Earth Seed's ultimate protocol. 590
• Senses corruption and Abyssal influence deep beneath Teyvat's earth. 620 624
• Softens rock strata and assists in excavating and moving a Moonhunter-corrupted mountain. 621
• Gains improved authority over Teyvat's earth and Geo power after receiving Geo origin from Azhdaha. 626

Dragon Spirit

Dan Heng can manifest a Dragon Spirit independently of his body.

• Uses it to burrow underground and awaken Azhdaha's temporarily revived spirit. 624
• Employs it to maintain a connection with Star while searching the Memory Tide. 590
• Uses it in his Teng Huang form when sensing and influencing the earth. 624

Equipment / Weapons / Items

• Jiyun Spear — His spear, used to block Blade's attacks and entrusted to Star during a private discussion with Dan Lei. 263 406
• Chongyuan Bead — A Dragon Sovereign pearl tied to his Yin Yue Jun power; he cannot simply return it to Bailu without surrendering that power. 261 262
• Earth Seed of Destruction — Enables terrain manipulation, Immortal Power integration, and a special data-storage protocol. 588 590
• Teyvat Geo origin — A cluster granted by Azhdaha that improves his earth and Geo control. 626

Relationships

• Dan Lei — Fellow Sustainer clansman but not a blood relative. Their connection is initially tense because of Dan Heng's link to Dan Feng; they later cooperate repeatedly on Luofu affairs, and Dan Lei entrusts him with teaching Bailu and handling the Dragon Masters' rebirth. 147 261 263 406
• Bailu — Fellow Dragon Sovereign and student. Dan Lei appoints Dan Heng as her instructor in Yin Yue Jun techniques; together, they help seal Jianmu's roots. 261
• Star and March 7th — Express Crew companions whom Dan Heng considers more like siblings than romantic partners. He risks himself to rescue them from Long Night Moon's Memory Tide. 590 599
• Welt — Fellow Express Crew member and collaborator in negotiating Azhdaha's temporary release. 624 625
• Jingliu — A former associate of Dan Feng who directs lasting anger toward Dan Heng; despite this, she eventually refrains from seriously harming him when the Luofu needs his combat power. 221
• Azhdaha — A fellow Dragonkin whom Dan Heng refuses to resurrect for war against Liyue. After a negotiated release, Azhdaha grants him Geo origin and Dragon King Authority. 625 626
• Zhongli — Works with Dan Heng and Welt to address Azhdaha's awakening and seal-related conflict. 624 625

Story Role / Major Arcs

Luofu Return and Jianmu Crisis

Dan Heng returns to the Luofu during its crisis, fights hostile golden constructs alongside Xueyi, Sushang, and Luocha, and learns that Dan Lei has become the new Sustainer Dragon Sovereign. 212

He opens the Scale Abyss Realm, accepts the responsibility of teaching Bailu, and helps suppress Jianmu's roots with the combined power of three Dragon Sovereigns. 235 261

Imprisonment Court Escape

When Jingliu, Blade, Rochu, and the former Dragon Masters escape the Imprisonment Court, Dan Heng works with Dan Lei to contain the aftermath. He personally helps Taoran, Xuepu, and Feng Huan shed their scales, giving them rebirth rather than execution. 262 263

Onpharos and the Memory Tide

Dan Heng inherits the Earth Seed to gain a place in the confrontation with Long Night Moon. He uses its authority to create terrain, becomes trapped in the Memory Tide, and searches for Star for fifteen years by Onpharos time before reinforcements arrive. 588 590

Teyvat Dragon King Investigation

After his power causes seismic disturbances, Dan Heng investigates Azhdaha's calls with Welt. He rejects resurrection for the purpose of war, supports a temporary release of Azhdaha's consciousness, and receives Geo origin that expands his Teng Huang form's authority over Teyvat's earth. 620 625 626

Notable Quotes

“Though I am a Dragonkin, I am not an emissary of Immortality. Everything I do is my own choice, and it has nothing to do with the current Stellar Gods.” 605

“If your purpose for resurrection is still to break the seal and lead the Geo Dragon Lizards to war with Liyue, then I refuse to resurrect you.” 625