Lin Yi

Biodata

Feature	Value
Name	Lin Yi (林翊)
Alias(es)	Boss Lin; “Boss,” used by Morgan Stark 1
Species/Race	Human with sunlight-strengthened, Superman-like physiology 1 6
Gender	Male 1
Affiliation	Ally of Tony Stark and the Avengers; expedition companion of Doctor Strange and Peter Parker 4 25
Occupation/Role	Superpowered combatant; protector of Morgan Stark; investigator of the Cosmic Virus 13 24 45
Residence	A treehouse on Tony Stark’s wooded property during his first five years in the Marvel universe 1
Status	Alive; accompanying the alternate-universe Morgan toward his home universe’s future timeline 49 50
First Appearance	Chapter 1 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Discovery of solar-powered growth	1	After arriving in the Marvel universe, discovers that sunlight strengthens him without a system. Building his treehouse without becoming tired prompts him to investigate his new physique.
Five years of solar strengthening	1	Gradually unlocks Superman-like abilities, including flight. Estimates himself to be stronger than the cinematic Man of Steel, but lacks a reliable benchmark and continues growing.
First five-Stone gauntlet	8	Assembles a Nano Gauntlet from the Mark 50 and Tony’s design. Endures the combined energy surge of five Infinity Stones without lasting harm; their abilities are equipment-derived.
Practical combat development	12 13	Learns through fighting Variant Thanos after five years without formal combat instruction. Adapts from direct punching to Stone-assisted movement, teamwork, and timed attacks.
Temporary six-Stone empowerment	14 15	Feels power tens or potentially hundreds of times greater than his usual sunbathing sensation. Survives using all six Stones to erase Thanos’s forces, although the gauntlet explodes and he becomes exhausted.
Accelerated Lost Library study	22 23	Partially releases his Super-Mind and uses the Ancient One’s enchanted coin and the Time Stone to absorb alien languages, dimensional knowledge, and magical theory.
Usable low-level magic	24	Confirms that he can safely cast basic offensive and defensive spells and opens a portal without a Sling Ring. Advanced spells remain beyond his reliable control.
Sealed reserve of forbidden knowledge	24 25	Finishes the library’s collection in less than a week of outside time. Bundles dangerous knowledge away for gradual understanding rather than treating memorization as mastery. His aura becomes unstable after the study.

Background / History

Lin Yi went to sleep at home and woke on a tree branch in the Marvel universe. He arrived shortly after Thanos’s Snap and destruction of the Infinity Stones; the cause of his transmigration remains unknown 1 2.

Initially afraid of encountering supervillains, he stayed near Tony Stark for safety and built a treehouse despite being told to leave. Tony’s investigation found no records of his existence. Nevertheless, Tony allowed him to remain after sensing no malice in him, while arranging surveillance of the woods 1 3.

Over the following five years, Lin Yi spent most of his time sunbathing, visiting the Stark household, and playing with Morgan. His friendship with Tony deepened after he saved Pepper and Morgan from a missile attack on the lakeside cabin. Tony subsequently gave him a Mark 50 suit, nominally as a loan for learning to control his powers and collecting physical data 3 4.

The Ancient One later described him as “absolutely unique,” despite his origins pointing toward countless dimensions and possibilities. Neither she nor Doctor Strange could observe his past or future through their usual methods. Her explanation suggested that the unfolding crisis was not simply a consequence of his interference with familiar events 19 22 23.

Personality

Lin Yi is irreverent, playful, and comfortable exploiting his friendship with Tony for free meals or access to armor. A former avid internet user, he excels at shameless verbal sparring, disguising rule-breaking with elaborate wording and regularly provoking Tony 2 3.

His confidence develops alongside caution. He spends five years strengthening himself before entering the wider conflict, yet becomes impatient when the Avengers’ fear of another failure stalls their planning. He is willing to change the expected storyline rather than preserve it at the cost of someone’s life 1 5 7.

His teasing conceals strong protective attachments, especially toward Morgan. He objects to the alternate Tony’s isolation of his daughter, devotes time to cheering her up, and becomes furious when she is injured. He also deliberately restrains his Super-Mind to preserve ordinary emotions and human values 7 32 35 45.

Abilities & Skills

Solar-Powered Physiology

• Continuous growth: Sunlight strengthens his body and gradually unlocks abilities. He has no accompanying system 1.
• Super strength: Tony’s recorded estimates include lifting a Helicarrier with one hand. Lin Yi later fights Variant Thanos directly and rapidly subdues Aberrant 79 6 12 45.
• Extreme durability: Tony’s data estimates that his skin could withstand a flagship’s main cannon without damage. Lin Yi also survives the energy of all six Infinity Stones and his gauntlet’s destruction 6 14 15.
• Limits: Variant Thanos can hurt him, and concentrated Stone-energy attacks produce painful backlash and interruptions in his offense 12 13.
• Incomplete measurements: The data Tony presents is two years old, excludes Lin Yi’s best results, and was collected without him going all out 7.

Flight, Speed, and Biofield

• Flies faster than Tony’s armor, catching him within seconds and carrying him to the lakeside cabin 17.
• Carries the alternate Morgan at nearly twice the speed of sound while protecting her with a biofield 33.
• Uses a protective aura to keep Morgan safe during their early flights 1.
• His flight still requires changing direction physically; the Space Stone offers greater mobility through immediate teleportation 13.

Enhanced Senses and Intuition

• Super hearing: Overhears conversations and JARVIS’s warnings; even his unassisted senses exceed ordinary human limits 2 28.
• Super Vision: Tracks Tony and locates people inside Stark Tower 30 32.
• Vision limits: Cannot penetrate the Quantum Woman’s obscured face or the metallic Icosahedron 10 11.
• Sixth sense: Receives intuitions that guide beneficial choices. One such warning keeps him near the cabin before the missile attack, while another convinces him that the Icosahedron is important 10.
• Threat awareness: Detects surveillance and later senses an unsettling presence tracking his departing group 28 49.

Super-Mind

• Absorbs information at extraordinary speed, including alien languages and the Lost Library’s magical knowledge 22 24.
• Divides his attention between reading and experimenting with selected spells 23.
• Places self-imposed restraints on the ability because sustained use could erode his emotions and shift his values toward an inhuman cosmic perspective 7.
• Bundles dangerous knowledge away, allowing it to enter his active understanding gradually rather than overwhelming him 24.

Magic

• Basic spellcasting: Safely uses simple offensive and defensive magic 24.
• Teleportation: Opens a portal to the New York Sanctum without a Sling Ring 24.
• Spatial manipulation: Creates a temporary loop that traps the alternate Tony inside his room for roughly two or three hours 33 34.
• Pocket dimension: Stores armor reactors, equipment, and Morgan’s luggage 35 48.
• Minor deception and conjuration: Makes shop staff believe he has presented identification and conjures gold flakes to pay for a phone 27.
• Advanced-spell limits: Can force spells such as Large-Scale Corrosion Magic to activate, but cannot reliably control or stop their effects 24.
• Dimensional interference: Finds himself unable to open portals in the alternate universe and suspects powerful observers are interfering; the cause is not confirmed 45 49.

Infinity Stone Use

These abilities depend on the Stones rather than his natural powers.

• Space Stone: Teleports between allies and opponents, sharply reducing Thanos’s reaction time 9 12 13.
• Time Stone: Freezes time on Vormir and later stalls Variant Thanos’s impending explosion 9 13.
• Mind Stone: Incapacitates Thanos during the Soul Stone theft 9.
• Reality Stone: Conceals the Benatar and creates duplicates to confuse Variant Thanos 9 13.
• Soul Stone: Releases an explosive attack against Variant Thanos, suffering painful backlash 12.
• Combined Stones: Contains the destructive energy of Thanos’s collapse and erases his forces across the universe 13 15.
• Restrictions: The Stones cannot be used effectively inside the Quantum Realm 10.

Foreknowledge and Combat Adaptation

• Recognizes the time-heist storyline from films and warns the Avengers about the Soul Stone’s sacrifice requirement 2 5.
• Uses that knowledge to devise a retrieval plan that avoids sacrificing Natasha or Clint 5 7 9.
• His recollection is fallible: he overlooks the danger of Nebula’s replacement and questions whether something is affecting his memory 9 10.
• Initially lacks formal fighting instruction. His battle with Variant Thanos becomes a practical lesson in combat and exposes the difference between raw strength and experience 12.

Equipment / Weapons / Items

• Mark 50 Nanotech Armor — Given by Tony after the rescue of Pepper and Morgan. Its physical performance is inferior to Lin Yi’s body, but it provides combat assistance, data collection, and the basis for his Nano Gauntlet 3 8 12.
• Nano Gauntlet — Built using Tony’s unfinished design and modified to operate independently of the armor’s reactor. Destroyed when Lin Yi uses the six-Stone Snap 8 9 15.
• Infinity Stones — Temporarily entrusted to him during the retrieval mission and ensuing crisis 8 17.
• Metallic Icosahedron — A half-palm-sized object given by the Quantum Woman. Attaches to his hand and forcibly pulls him through the Quantum Tunnel to the battlefield 10 11.
• Enchanted coin — Carries the Ancient One’s Mental Acceleration Spell; assists reading and retention while automatically supplying books and turning pages 21.
• Mark LXXXV armor — Uses it to impersonate Tony and entertain the alternate Morgan; explains that another version of Tony gave it to him 35 36.
• Morgan fan badge — Identifies him as the alternate Morgan’s tenth officially recognized fan and offers access to weekly supplies 27 28.
• Cosmic Virus isolation technology — Receives compiled technology and two complete equipment sets from the alternate Tony after saving Morgan 46 47.
• Alternate Mind Stone and MK97 Prototype reactor — Gifts from the alternate Tony. The reactor is intended for Lin Yi’s Tony; the upgraded technology includes Cosmic Virus isolation, though some components remain unstable 49.
• Nano Time Suits — Carries two by the return journey and gives Morgan the previously used suit whose navigation device had been destroyed 50.

Relationships

• Tony Stark — home universe — Neighbor, close friend, and benefactor. Their constant banter coexists with deep trust; Tony defends Lin Yi’s privacy and supports his Soul Stone plan 3 6 8.
• Morgan Stark — home universe — Longtime playmate whom he calls on to address him as “Boss.” Her later unconscious condition contributes to his urgency in seeking answers 1 29.
• Pepper Potts — home universe — Friend within the Stark household. He saves her and Morgan during the missile attack; she occasionally reprimands him for teaching Morgan unsuitable remarks 2 3.
• Steve Rogers — Initially wary of his strength and proposed strategy, but ultimately entrusts him with the Stones and acknowledges his contribution to victory 4 5 8 15.
• Natasha Romanoff and Clint Barton — Soul Stone retrieval companions. His intervention prevents either from becoming the required sacrifice, and he sends them ahead with the Stones when stranded 5 9 10.
• Thor — Briefly challenges him after questioning his absence from earlier battles, then makes an awkward attempt to ease the tension 6 7.
• Carol Danvers — Battlefield partner against Variant Thanos. Their coordinated attack removes the Time Stone, enabling Lin Yi’s final containment strategy 12 13.
• Doctor Strange — Ally and multiversal traveling companion who also fears that Lin Yi could become impossible to stop. Calls him a “wild card,” a label Lin Yi rejects 12 23 25.
• Peter Parker — Admires his fighting ability and accompanies him at Tony’s instruction, later joining the alternate-universe expedition 15 20 25.
• The Ancient One — Guide who sends him to the Lost Library and warns him against forbidden magic. Lin Yi questions her manipulation but accepts the need to protect the universe he regards as home 21 22 25.
• Morgan Stark — alternate universe — Becomes his friend after initially attempting to investigate and sedate him. He helps relieve her isolation, protects her from Aberrants, and accepts responsibility for accompanying her away from her endangered universe 28 29 33 45 49.
• Tony Stark — alternate universe — Begins as a suspicious, heavily armed adversary. Their relationship improves after Lin Yi saves Morgan, leading to technological cooperation and Tony’s request that he care for her 30 45 46 49.
• Quantum Woman — Mysterious figure who destroys his navigation device and gives him the Icosahedron. He later confirms that she is also the cloaked woman encountered by the alternate Tony and Morgan; her identity remains unresolved 10 35 38.

Story Role / Major Arcs

Time Heist and Soul Stone Retrieval

Lin Yi’s observations encourage Tony to reconsider time travel. After joining the Avengers’ preparations, he reveals the Soul Stone’s price and persuades them to gather the other five Stones first 2 3 5 7.

On Vormir, he waits until Thanos has sacrificed Gamora, then freezes time, incapacitates him, and steals the Soul Stone. This saves Natasha and Clint from the sacrifice requirement without preventing Gamora’s death. The Quantum Woman interrupts the return journey, leaving Lin Yi stranded after he sends his companions ahead 9 10.

Variant Thanos Battle

The Icosahedron pulls Lin Yi into a battle that has diverged from both his film knowledge and Strange’s predictions. He confronts the mutated Thanos, then coordinates with Carol and Tony to remove the Stones 11 12 13.

When the Power Stone drives Thanos toward a potentially planet-destroying explosion, Lin Yi waits for the final opening, removes it, and contains the released energy. He subsequently uses all six Stones to erase Thanos’s forces across the universe 13 14 15.

Cosmic Virus Investigation

Black-purple markings reveal that victory has not ended the danger. As infections spread and Morgan falls ill, Lin Yi seeks help from Strange and the Ancient One 15 17 19.

His Lost Library research identifies the markings as signs of a Cosmic Virus with no known cure. He also discovers coordinates associated with a universe that survived it. After learning magic and sealing away dangerous knowledge, he departs with Strange and Peter to seek a solution there 24 25.

Alternate-Universe Morgan and Isolation Technology

In the surviving universe, Lin Yi befriends Morgan while investigating its defenses against the virus. His attention exposes the loneliness caused by Tony’s protective measures, including using the Mind Stone to erase her from public awareness 27 28 32.

After protecting Morgan and defeating Aberrants 78 and 79, he gains Tony’s cooperation and the isolation technology he needs. He promises to return when his own universe is stable, intending to investigate the blocked portals and hidden observers. Tony sends Morgan with him, entrusting her safety to Lin Yi 45 46 49.

Notable Quotes

“I'm Lin Yi, and sunlight makes me stronger!” 1

“Regardless of whatever decision you make, there's no right or wrong to it.” 2

“I! AM! IRON MAN!” 35