Su Wei

Biodata

Feature	Details
Name	Su Wei (苏维)
Alias(es)	Mysterious Black Merchant (constructed persona) 99 101
Species/Race	Human
Gender	Male
Affiliation	Advanced Nurturing High School, Class D; Black Sphere “Fixed Personnel” 53 68
Occupation/Role	Student; behind-the-scenes operator of Black Sphere trials and supplier of training opportunities, rewards, and equipment 7 40 202
Status	Active 224
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Initial overpowered toolkit	1	Obtained the Devil Passport on his first day after transmigrating; he also possesses a Time Pause Watch, giving him an overwhelming early advantage. 1
Black Sphere combatant	14–20	Demonstrated mastery of the extendable Combat Knife against Evil Spirits, earned S Points in the trials, healed his congenital physical damage, and redeemed a Reinforcement Suit. 14 17 18 20
Heartsteel accumulation	59–77	Acquired Heartsteel, whose passive permanently raises his maximum health after powerful strikes; by the rooftop training period, he had accumulated nearly 200 stacks, later exceeding 300. 59 71 77
Omnitrix user and merchant persona	73, 99	Received the Omnitrix (Initial Prototype), used its transformations to prepare a Black Merchant persona, and transformed into a Galvan while developing equipment and trial infrastructure. 73 99
Incursio wielder	138, 157–158	Chose Incursio as his high-end armor; its defenses and adaptive evolution allowed him to overpower Ayanokoji’s Titan form. 138 157 158
Ripple Qi Gong mastery	154, 161	Demonstrated mastery of Ripple Qi Gong and learned to conduct Ripple through weapons, a technique Ayanokoji acknowledged as superior to his own. 154 161
Stand fusion: The World	186	Successfully fused with the Stand Disc: The World after testing compatibility with Horikita and Karuizawa. 186

Background / History

Su Wei transmigrated into the world roughly two to three weeks before the early events of the story. On his first day, he used the Devil Passport to secure enrollment at Advanced Nurturing High School and received powerful items that made ordinary retaliation or domination feel too easy to entertain him for long. 1 7

As Ghouls, Parasites, and other anomalies began appearing, Su Wei concluded that the world was becoming increasingly unsafe. Rather than merely protecting himself, he decided to use the school’s exceptional students to gauge the danger of the changing world and cultivate capable “hero units.” 7

He gradually assumed control over the Black Sphere system’s direction, organizing deadly games, assigning monsters and rewards, monitoring participants, and creating the Mysterious Black Merchant identity to introduce equipment and opportunities without openly revealing his position. 40 73 99 101

Personality

Su Wei is detached, self-assured, and easily bored by situations where his advantage is absolute. He views the school’s escalating survival trials as both a means of testing the world and a source of entertainment, often maintaining a casual facade while calculating outcomes far in advance. 1 7 103

He is highly manipulative when arranging trials, monster encounters, rewards, and emotional dependencies. He frequently withholds information, cultivates pressure in others, and engineers circumstances meant to force growth. 52 88 148 208

Despite this, Su Wei is not indiscriminately cruel. He repeatedly protects students in immediate danger, shares useful intelligence, trains those seeking strength, and favors making his allies more capable so they can survive without becoming liabilities. 16 20 70 112 159

Abilities & Skills

Black Sphere Administration

Su Wei can direct or alter elements of the Black Sphere trials, including game formats, monster rewards, surveillance, and supporting infrastructure.

• Initiated the Wolf and Sheep Game based on Alice in Borderland. 40
• Observes participants through Black Sphere surveillance feeds. 73
• Created plans for the Mysterious Black Merchant and remotely controlled merchant operations through a cloned Small Soldier body. 99 101
• Assigns special drops to powerful monsters to incentivize participants. 159 174
• Repurposes defeated monsters as sparring opponents in the Hyperbolic Time Chamber. 202
• Erased witnesses’ memories after killing Saeki Sorao. 63

Physical Augmentation

Heartsteel has elevated Su Wei’s physical capabilities far beyond ordinary human limits.

• Its passive increases maximum health after a powerful strike, with a 30-second cooldown for each target. 71
• A kick against The Silence increased his maximum health by 24 points. 59
• His accumulated stacks allow him to train against Reinforcement Suit users without wearing his own suit. 70 99
• He can jump more than ten meters and strike with enough force to destroy armored targets. 85
• His baseline durability is sufficient to endure attacks that would overwhelm most Reinforcement Suit users. 112 176

Swordsmanship and Close-Quarters Combat

Su Wei is an experienced close-range fighter who combines weapon skill, physical enhancement, and tactical targeting.

• Killed an Evil Spirit with a single strike from his extendable Combat Knife. 14
• Saved Ichinose from a Parasite by destroying its detached possession limb. 16
• Fought Gotou at close range while enduring repeated high-speed blade attacks. 48
• Defeated Horikita in a sparring match by exploiting the weak points of her Reinforcement Suit. 92
• Teaches meditation, opening recognition, and targeted attacks on an opponent’s vulnerabilities. 70

Ripple Qi Gong

Su Wei has mastered Ripple Qi Gong and uses it as both a combat technique and a training method.

• Demonstrated Ripple Qi Gong’s benefits to Karuizawa. 154
• Can conduct golden Ripple through a weapon. 161
• Uses Ripple alongside weapons during high-level combat. 161
• Encourages students with aptitude, including Nanase, to develop the technique through practical combat. 154

Omnitrix Transformations

The Omnitrix (Initial Prototype) allows Su Wei to transform into alien heroes.

• Received the device after Karuizawa transferred 41,400 points to him. 73
• Transformed into a Galvan while preparing the Black Merchant operation and gathering creature DNA. 99
• Uses the device’s transformations as part of his merchant and equipment-development plans. 73 99

Stand: The World

Su Wei successfully fused with The World Stand Disc after the Pillar Men arc.

• Tested Stand Disc compatibility alongside Horikita and Karuizawa. 186
• Fused with The World, while Karuizawa fused with Crazy Diamond. 186
• Trains allies to use Stand possession for self-defense. 186

Equipment / Weapons / Items

• Devil Passport — Used to secure his enrollment after transmigrating. 1 7
• Time Pause Watch — One of his early high-level items. 1
• Teigu: Spectator — Auxiliary Teigu with Insight, Long-distance Vision, X-ray Vision, limited Precognition, and Illusion. 10
• Combat Knife / Battle Blade — Extendable black blade effective against Evil Spirits, Parasites, and mechanical enemies. 14 16 85
• Reinforcement Suit — Greatly enhances strength, agility, senses, and jumping ability; its blue rings are a critical weakness if punctured. 20 71
• Heartsteel — Stacking item that permanently increases maximum health through powerful strikes. 59 71
• Radar Controller — Projects a terrain map, identifies allies and monsters, tracks targets across the map, and includes optical camouflage. 89 112
• Omnitrix (Initial Prototype) — Transformation device used for alien forms and Black Merchant preparations. 73 99
• Incursio — Adaptive armor whose defenses proved nearly impervious to Ayanokoji’s close-range attacks. 138 158
• Crazy Diamond — Restoration Stand ability used to heal himself and Ryuen during the battle with the Pillar Men. 176
• The World Stand Disc — Fused with Su Wei following Kars’s defeat. 186
• Inverted Spear of Heaven — Weapon capable of cutting through supernatural techniques, used against Jogo’s fire attacks. 135
• Split Soul Katana — Blade that damages the soul; used to prevent Crazy Diamond from restoring Kars’s soul-damaged body. 135 179
• X-SHOT GUN — Entrusted to Karuizawa during Ayanokoji’s challenge. 157

Relationships

• Sakayanagi Arisu — Frequent ally, observer, and personal provocateur. She repeatedly probes Su Wei’s past, buys his private time, and openly expresses interest in him. 18 36 139
• Ichinose Honami — Student and trusted ally whom Su Wei protects, advises on the Reinforcement Suit, and trains in swordsmanship. Their relationship develops through shared trials and rooftop practice. 20 64 70 112
• Karuizawa Kei — Dependent ally who sought Su Wei’s protection during the Black Sphere exams, transferred him 41,400 points, and later confessed her feelings. 72 73 184 208
• Horikita Suzune — Student and combat trainee. After Su Wei defeated her in a duel, she asked him to teach her how to become stronger. 92 96
• Ayanokoji Kiyotaka — Rival and occasional collaborator. They sparred in the Hyperbolic Time Chamber, where Su Wei’s Incursio forced Ayanokoji to concede. 157 158 161
• Ryuen Kakeru — Competitive ally and fellow combatant. Su Wei works with him during major Black Sphere battles and supports his mechanical ascension. 14 174 176
• Shiina Hiyori — Ally whom Su Wei located with the Radar Controller and rescued from an Evil Spirit; she trusts him after the incident. 63 112
• Amasawa Ichika — Potential trainee and intelligence asset. She asked Su Wei to teach her swordsmanship, and he allowed her an opportunity to participate in an upcoming exam. 99
• Wang Meiyu — Fellow Chinese international student who became friends with Su Wei. 54

Story Role / Major Arcs

• Early Black Sphere Trials — Participates in the first battles against Parasites and Evil Spirits, demonstrating superior judgment, combat ability, and willingness to conceal his true motives. 6 14 16
• Reinforcement Suit Arc — Redeems and demonstrates the suit, revealing its performance and limitations while helping Ichinose understand the value of equipment. 18 20 21
• Mastermind Expansion — Begins directly shaping Black Sphere games and uses the school’s students as test subjects for a larger survival framework. 40 52
• Training and Hero Cultivation — Takes Ichinose, Horikita, and others as trainees, using sparring and controlled pressure to improve their practical combat ability. 70 92 96
• Mysterious Black Merchant Arc — Uses the Omnitrix, Black Sphere Space, and a remotely controlled avatar to establish a black-market merchant persona. 73 99 101
• Pillar Men Arc — Leads preparations against Wamuu, Esidisi, and Kars, employs Crazy Diamond in battle, and later acquires The World Stand Disc. 174 176 186
• Hyperbolic Time Chamber Training — Serves as the group’s primary training benchmark, coordinating simulated battles and preparing students for increasingly dangerous exams. 157 160 161 202

Notable Quotes

“If my teammates are stronger, I'll have less to worry about, right?” 20

“Before the world descends into total chaos, this game still has its necessity.” 7

Trivia

• Su Wei is a Chinese international student at Advanced Nurturing High School. 54
• He publicly presents himself as a mediocre student who only aims to pass examinations, while privately planning to control his scores to preserve that persona. 103
• Although he claims not to have formally practiced swordsmanship, he is capable of teaching multiple students and defeating Reinforcement Suit users in close combat. 51 70 92
• He uses the nickname “Main God” when considering his authority over the Black Sphere system and its operations. 22 101