Rein

Biodata

Feature	Details
Name	Rein (雷恩)
Alias(es)	Doctor Rein; Nicholas; Lord Rein; “Princess’s man”
Species/Race	Human
Gender	Male
Affiliation	Black Dragon City; formerly associated with the Weasel Bandit Group; ally of the Black Gold Merchant Guild and Kolman Tribe
Occupation/Role	City Lord of Black Dragon City; Battle Doctor; surgeon; potion-maker; mechanic trainee
Status	Alive
First Appearance	7

Power Progression

Stage / Realm / Level	Chapter	Notes
First Tier Extraordinary	154	Had advanced from a novice Extraordinary after the Plague Base period; his [Corpse Stitcher] sequence enhanced strength and five senses.
Second Tier [Awakened]	154	Reached the Second Tier within months and cultivated the Great Strength Demon God secret method through his profession-exclusive control of Battle Qi in the muscles.
Third Tier Extraordinary	244	Condensed the Thunder Tiger Momentum and consumed the [Voodoo Master] Gene Potion; his Battle Qi, physical attributes, senses, reaction speed, and willpower surged.
Fourth Tier [The Observer]	334	Advanced to Fourth Tier and gained the Eye of Insight, including X-ray-like vision with an initial range of roughly twenty meters.
Fifth Tier Extraordinary	360	Comprehended the Thunder Law and advanced to Fifth Tier, greatly strengthening his Thunder Shadow Instant Body.

Background

Rein transmigrated into the world of Extraordinary Mechanical City and spent roughly a year with the Weasel Bandit Group, where his knowledge of the wider world remained limited. While apprenticed to Piscis, he used the Smart Brain’s dream simulations and real-world practice to recreate the antidote to the [Zombie Potion] in a remarkably short time. 16 33

At the Storm Lake Black Market Trade Fair, Rein killed the assassin Wolf and escaped an interrogation attempt by Piscis and the mental transcendent Serxi. The Smart Brain activated a poison-gas bomb that killed both opponents, though the explosion also devastated the tavern and drew the attention of White Wolf Bazel. 20

While crossing the Ice Ridge Wasteland, Rein encountered the injured Ymir without recognizing her as Oma’s Eldest Princess. He accepted employment as her doctor and helped escort her toward Snow Eagle Fortress, beginning a lasting alliance. 29 32 33

Appearance

Rein is a strongly built young man whose physique becomes increasingly imposing as his body-refining cultivation advances. He originally has yellow hair, though he has repeatedly altered his appearance to evade wanted posters and hostile intelligence networks. 39 300

• Naturally yellow-haired; dyed his hair flaxen and styled it differently while evading pursuit. 39
• Frequently wears a pointed-beak gas mask or a black leather half-mask as part of his disguises. 38 39
• Possesses a heavily muscled body strengthened by the Great Strength God Art, bloodline worms, and lightning forging. 300 323
• Wears Black Dragon City Lord formal attire for major public occasions: a white suit, cape, dragon-crest buttons, Earth Dragon-hide belt, and Silver Lion Cane. 277

Personality

Rein is cautious, pragmatic, and highly adaptive. Early in his journey, his overriding objective is freedom; he plans carefully, avoids unnecessary risks, and treats unknown people as potential threats until evidence proves otherwise. 16 29 38

He is also relentlessly curious. Whether faced with ancient scripts, medicine, martial arts, mechanics, languages, or political theory, Rein uses the Smart Brain to collect information and rapidly turn it into practical knowledge. 7 59 86 117

In combat, Rein is decisive and often ruthless. He will endure severe injury, exploit an opponent’s ignorance, and use traps, poison, surgery, or overwhelming force when necessary. Despite this, he retains a personal sense of justice: he seeks the strength to confront what he considers wrong rather than merely survive it. 135 230 250

Abilities & Skills

Smart Brain

Rein possesses the Smart Brain, an analytical system that records data, identifies patterns, simulates training, and assists his learning.

• Automatically scans and records unknown writing, patterns, and data. 7
• Allows dream-based practice; dream time is accelerated roughly twentyfold. 16 106
• Analyzes speech, micro-expressions, and behavior to assess risk. 29
• Rapidly deconstructs unfamiliar languages from sufficient samples, enabling Rein to learn Korman and Monkel Ancient Language. 53 59 61
• Captures, analyzes, and simulates martial techniques during live combat. 86 283

Battle Doctor Sequence

Rein’s Extraordinary path combines medical skill, physical power, heightened perception, and battlefield survivability.

• His [Corpse Stitcher] Potion improves strength and all five senses, including visual tracking, spatial hearing, and tactile sensitivity. 111
• Performs advanced surgery under extreme conditions, including suturing his own throat after a fatal slash. 99
• Can treat severe injuries on himself during battle and restore damaged muscles through the [Divine Healing Technique]. 248
• His healing and poison resistance let him cultivate under conditions that ordinary Extraordinaries cannot endure. 154 273

Thread Needle Thread

An exclusive Battle Doctor secret method translated from an ancient scroll with Wudo’s assistance.

• Splits Battle Qi from Rein’s sea of qi into fine Gang Lines capable of rapidly stitching wounds and preventing fatal blood loss. 61
• Each additional qi thread increases Battle Qi recovery, Source Power accumulation, and Battle Qi capacity by 1%. 61
• Enables precise treatment such as extracting Bazel’s embedded silver needles. 177
• Forms the basis for Rein’s unusually high Battle Qi reserves and sustained combat ability. 185 241

Body Refinement and Monstrous Strength

Rein practices the [Hercules Art] and later gains access to the complete Great Strength God Art inheritance.

• Uses Gang Lines as external stimulation to complete the Hercules Art’s anti-human movements and strengthen his body. 63
• Reached the Divine Steel Realm, granting a metallic golden-body defense and extreme physical power. 282 300
• His strength can break higher-tier Bodyguard Battle Qi once its defensive threshold is exceeded. 323
• By the Fifth Tier, his raw power is feared even by powerful Bloodline Extraordinaries. 358 360

Thunder Cultivation

Rein chose a thunder-element magical beast core for his advancement path and developed thunder-based Battle Qi and movement techniques.

• Condensed the Thunder Tiger Momentum as the foundation for his Third Tier advancement. 240 244
• Bears a passive Thunder Totem that improves lightning resistance; he can eventually cultivate through lightning storms. 185
• Uses thunderstorms and the Thunder Raven’s elemental sensing to forge his body with lightning. 296 300
• Comprehended the Thunder Law by the Fifth Tier. 360

Martial Arts

Rein learns martial techniques with abnormal speed, combining Qi Master and Martial Artist methods.

• Learned Iron Mountain Lean from Uncle Sam and mastered it within two days. 44 47
• Recorded and studied the teachings of Grandmasters Capone Gonzalez and Qiang Hu through the Smart Brain. 84 86
• Uses multiple Six Forms of Combat Profound Meanings, including [Cannon Fist], [Wind Walk], [Storm Slash], and [Divine Movement]. 83 246
• Uses Condense Qi into Gang, a secret method that compresses Battle Qi to improve physical penetration against stronger opponents. 323 358
• Pursues an “invincible in the world” Fist Intent and refines his techniques through real combat against stronger opponents. 274 283

Divine Ability: Thunder Shadow Instant Body

A lightning-based movement divine ability from the inheritance of Arurete Pallas, the Thunder Nightmare.

• Produces erratic movement trajectories that make Rein difficult to predict or target. 272
• Allows instantaneous, lightning-fast repositioning after Rein comprehends the Thunder Law. 338 360
• Requires exceptional physical strength and lightning-element Battle Qi; true aerial movement remains beyond his early mastery. 272

Void Ten Thousand Poisons Hand

A poison-based secret method suited to Rein’s Battle Doctor constitution.

• Infuses poisonous effects into his attacks through Battle Qi. 273 338
• Benefits from Rein’s exceptional poison resistance and physical penetration. 273
• At the beginner stage, poisonous mist can still leak from his hand and endanger nearby allies. 274

Eye of Insight

Rein’s Fourth Tier [Observer] ability.

• Provides X-ray-like perception through obstacles and clothing. 334
• Initially has an effective range of approximately twenty meters. 334

Equipment

• Steam Mechanical Power Arm — A powerful mechanical arm that lets Rein overpower magical beasts his rogue skills could not reliably harm. 28
• Silver Radiance Sacred Artifact — Used to implant silver needles into opponents during close combat. 240
• Storage Rings — Carries medical supplies, weapons, disguises, and other essentials. 32 175
• Disguise Mask — Gifted by Ymir before Rein left Black Dragon City for external training. 216
• Pika / Immortal Thunder Raven — A contracted thunder-element companion spirit beast that consumes lightning and assists the cultivation of the Thunder God Art. 273
• Silver Lion Cane — Part of Rein’s Black Dragon City Lord formal attire. 277

Relationships

• Ymir Spurglin — Initially Rein’s employer in the Ice Ridge Wasteland; later his trusted ally and a central partner in Black Dragon City’s rise. 32 102 322
• Canossa J. Clofiler — Vice President of the Black Gold Merchant Guild, Rein’s ally, frequent collaborator, and intimate companion. 177 242 274
• Wudo — Kolman High Priest who translated ancient texts for Rein; their relationship developed from hostility and captivity into trust, cooperation, and mutual affection. 59 61 152 216
• Bazel — One of the Top Ten Legendary Demon Hunters; Rein’s friend, mentor, combat supporter, and patient. 86 95 177
• Ilubeck — Great Potion Master and Rein’s teacher in medicine and potionry. 69 80 83
• Tuster Fontes — Master Mechanist and ally whose work inspires Rein’s faith in mechanical power. 128 313
• Karl — Tuster’s grandson and a gifted mechanic; Rein encourages his mechanical ambitions and works alongside him. 79 116
• Mafat — Great Shaman of the Kolman Tribe; advises Rein on totems, cultivation, and the nature of Momentum. 149 185 215
• Guy Vilias — The [Sword of Justice], who guides Rein’s understanding of Momentum, Intent, and conviction. 224 229
• Nareta — A Curse Tribe girl healed by Rein; she later becomes more comfortable living among Rein’s companions. 224 295
• Catherine — President of the Redwood Merchant Guild and Canossa’s maternal aunt; became an ally after Rein saved her expedition from the Black Skull Phantom Thieves. 242 243

Story Role / Major Arcs

• Storm Lake Black Market Trade Fair — Rein prepares an escape from Piscis, creates a [Zombie Potion] antidote, kills Wolf, and uses a poison-gas bomb to eliminate Piscis and Serxi. 16 20
• Ice Ridge Wasteland Journey — Rein encounters Ymir, accepts employment as her doctor, and later disguises himself after becoming wanted in Oma. 29 32 37 39
• City of Radiance — Learns Korman and Monkel Ancient Language with Wudo, discovers [Thread Needle Thread], becomes Ilubeck’s student, and studies martial arts. 59 61 80 86
• Kolman Tribe and Black Tide — Builds ties with the Kolman Tribe, develops his thunder cultivation, investigates the effects of bloodline worms, and survives the Moroshir King Flower crisis. 152 177 184 185
• Black Wind Territory Expedition — Seeks captured Kolman warriors, heals Nareta, battles the Black Skull Phantom Thieves, kills Qilos, and advances to the Third Tier. 224 240 244
• Rise of Black Dragon City — Assumes the role of Black Dragon City Lord, confronts the Sunflower Merchant Guild, and helps defend the city during major conflicts. 277 282 287
• Imperial Capital Arc — Accompanies Ymir to Oma, learns [Condense Qi into Gang] from Andrew, survives political conspiracies, and advances to Fourth Tier. 323 328 334
• Later Wasteland Conflicts — Obtains portions of the Seventy-Two Divine Generals’ inheritances, reaches Fifth Tier, and directly confronts Blood Ancestor Lilith Dracula. 351 358 360

Trivia

• Rein initially mistook Ymir for the daughter of a powerful noble family and did not know she was the Eldest Princess of Oma. 33
• He learned basic Korman in approximately five hours through Smart Brain-assisted language analysis. 59
• Rein’s enormous Battle Qi reserve is attributed to his Gang Lines, Thunder Totem, strong meridians, and mature neuro-bloodline worms. 185 241
• His public reputation evolves dramatically: he is first a black-market wanted man, later becomes known as “the Princess’s man,” and is eventually revered by Black Dragon City’s citizens as a near-mythic City Lord. 37 193 358