Lin Yuan

Biodata

Power Progression

Background

Before transmigrating, Lin Yuan was a spatial-physics PhD conducting a laboratory simulation when an earthquake struck. He awoke in the One Piece world in the body of a Marine recruit: an orphan from a West Blue island who had been adopted by the Marines and was the sole survivor of a patrol ship sunk by pirates 1.

Knowing the Door-Door Fruit’s potential, he stole it from Marine Branch 153’s warehouse and ate it. He concealed the ability during a selection test, using it to imitate Soru and earn a place under Zephyr’s instruction 1.

Appearance

Lin Yuan has black hair and black eyes. When he rescued Ginny, he appeared to be in his early twenties and wore a faint smile 20.

• He frequently stands or walks with his hands in his pockets 20 47 52.
• After the battle at Mary Geoise, he returned with dirt on his cheeks and dried blood on his collar 124.

Personality

Lin Yuan opposes the Celestial Dragons’ cruelty but is willing to wait until he has the resources to act. After witnessing a hunt, he secretly freed five children rather than abandon them to disposal. He later told Sengoku that they had not deserved to die 2 3.

He is calculating in recruitment and diplomacy. He described his early help to Moria as an investment, and told Bullet that a desperate prisoner would be more likely to follow a rescuer. He also avoided killing Marines during one confrontation partly to preserve room for negotiation 6 12 15.

Despite his planning, Lin Yuan values his companions and calls them “partners.” Ginny has warned him against shouldering everything alone; he admitted to her that he feared the coming battle at God Valley but intended to go anyway 17 33.

Abilities & Skills

Door-Door Fruit

Lin Yuan treats the fruit as a means of manipulating space rather than merely opening doors. His physics background informs his development of its applications 1 9.

• Spatial doors: Opens passages for travel, infiltration and transport. He bypassed the Seastone walls of God Valley’s prize warehouse by opening a passage around them 4 37.
• Micro-doors: Opens small passages to unlock restraints or redirect attacks. He used one to release Kaido’s chains and another to divert a Marine officer’s blade 11 21.
• Deflection: Redirected gunfire into the sky and turned Tie Gui’s axe strike against its wielder 4 83.
• Alternate-space storage: Created a warehouse invisible and inaccessible to outsiders; Bullet could not detect it with Observation Haki 8.
• Stamina limit: Repeated long-distance jumps exhausted him after his defection 4.

Spatial Perception

A fruit-based sense that maps nearby positions and structures. It is distinct from Haki and cannot be taught as Haki 5 6.

• Located guards, cells and surveillance blind spots inside Impel Down 6.
• Detected an old injury and a damaged shield within the Iron Wall Guard’s formation 83.
• Revealed internal channels in Seastone during Ryuo training 87.
• Loses accuracy at greater distances; Lin Yuan reported a range of two kilometers to Zephyr 64.

Space Folding

Compresses the distance between locations for rapid movement. Lin Yuan eventually used it without opening a visible door 3 8.

• Early attempts demanded considerable stamina and precision; one failure nearly killed him 3.
• At Wano, Tie Gui used Observation Haki to anticipate Lin Yuan’s destination after watching his movements 83.
• Against Imu, Lin Yuan folded space without a visible door or spatial fluctuation 119.

Space Cutting and Definition

Lin Yuan developed spatial rifts for cutting and later demonstrated a way to impose a rule on a defined area 17 119.

• Space Cutting: Progressed from cutting ordinary steel to cutting Seastone 17 28.
• Space Definition: Made the space around Imu impassable and restricted whose will could take effect there. Maintaining it drained Lin Yuan while Imu resisted 119 120.

Haki and Combat Training

Zephyr trained Lin Yuan in physical techniques and Haki. Lin Yuan initially relied heavily on Spatial Perception and struggled to use Observation Haki to anticipate attacks 62 63.

• Used Armament Haki to defeat a sea beast with his fists 70.
• Combined Armament Haki and Conqueror’s Haki Coating against the Iron Wall Guard 83.
• Began learning Ryuo, directing flowing Haki into Seastone with the aid of Spatial Perception 87.

Equipment & Items

• Void — Lin Yuan’s ship. Tom planned to improve it using recovered propulsion research, and it carried the crew to Sphinx Island and toward the Final Island 68 72 98.
• Dark-Dark Fruit — Seized from a World Government transport ship. Lin Yuan kept it for a potential recipient who had not yet been born 7.
• Roger’s sword — Used by Lin Yuan to wound Imu after Roger’s counter-curse weakened Imu’s recovery 118.
• Stimulant — Given to him by Vegapunk; it doubles physical strength for ten minutes at the cost of three days of paralysis 44.

Relationships

• Zephyr — His Marine instructor, who concealed Lin Yuan’s rescue of the enslaved children. Lin Yuan later saved Zephyr’s daughter Aqi and invited Zephyr to train his people on Hachinosu 3 57 58 63.
• Douglas Bullet — Lin Yuan rescued him from a burning ship and recruited him to fight the World Government. They trained together on a reef 5.
• Kaido — Joined Lin Yuan after being freed from captivity on Punk Hazard. He became one of Lin Yuan’s principal fighters 11 31.
• King — An early companion who accompanied Lin Yuan on missions including the God Valley warehouse raid and the Enies Lobby infiltration 12 37 68.
• Ginny — Lin Yuan rescued her from a transport ship. She became a key intelligence gatherer and advised him on threats and operations 20 27 31.
• Kuma — A member of Lin Yuan’s group who helped rescue civilians at God Valley and fought in Wano 31 37 83.
• Gecko Moria — Lin Yuan aided him after finding him wounded and later welcomed him to Hachinosu as a partner 15 17.
• Whitebeard — A pirate ally with whom Lin Yuan agreed to mutual aid and non-interference. Whitebeard later joined the Void Federation 72 122.
• Ivankov — An imprisoned Revolutionary Army member whom Lin Yuan repeatedly visited and promised to retrieve when his forces were strong enough 24 27 46.
• Morgans — An intelligence partner who exchanged information for news of Lin Yuan’s activities 19 31.
• Rocks — A powerful rival who sought Lin Yuan’s cooperation. Lin Yuan declined his offer, although they later fought Imu on the same side 30 118.

Story Role

Defection and the First Companions

After witnessing a Celestial Dragons’ hunt in the South Blue, Lin Yuan freed five enslaved children. Zephyr chose not to report him, while Sengoku warned that Lin Yuan did not belong in the Marines 2 3.

Lin Yuan escaped Marine Headquarters after an interrogation and acquired a 500 million Beli bounty. He rescued Bullet, trained with him, and began raiding World Government transport ships. The pair used their spoils to establish facilities on Void Island 4 5 7 8.

Hachinosu and God Valley

Lin Yuan recruited Kaido and King, then obtained Hachinosu from Ochoku by offering three billion Beli, seventy tons of Seastone and help taking Cat Island, while backing the deal with a threat of force. Void Island remained a backup base 11 12 14.

Learning that the Celestial Dragons planned another hunt at God Valley, Lin Yuan assembled his companions to raid the island for captives and Devil Fruits. He and King infiltrated the prize warehouse, where Lin Yuan secured the Azure Dragon Fruit before leaving to support the wider rescue effort 31 37.

Wano and the Final War

Lin Yuan expanded his Seastone business and intelligence network, negotiated with Big Mom, and settled a Ghost Sea dispute with Rocks by surrendering sixty tons of Seastone and promising one future long-distance door 47 52 63.

He allied with Whitebeard before moving against Kurozumi Orochi in Wano. During the assault, Lin Yuan defeated Tie Gui and halted the Iron Wall Guard, then entered the castle to aid Kaido. After the war, Hachinosu gained control of Seastone exports and port rights while Wano retained local governance 72 83 86.

As the conflict with the World Government escalated, Lin Yuan helped secure Oden’s return to Wano to open the seal concealing Pluton. At Mary Geoise, he fought alongside other major pirates against Imu, using Roger’s sword and his spatial powers to create openings for the allied fighters 105 118 119.

Void Federation

After Imu and the Five Elders were defeated, Lin Yuan proposed the Void Federation: an alliance of autonomous members with mutual defense and an annual Joint Conference on Hachinosu, but no supreme ruler or centralized enforcement. He planned to announce the old regime’s fall and dismantle its institutions across the four seas 122.

Returning to Hachinosu, he reported Roger’s sacrifice and the federation’s formation. He intended to rest before overseeing postwar cleanup and the new order’s early operations 124.

Notable Quotes

“Because I’m human. Instructor, so are you.” 3

“It’s not a prison break. We’re going to conduct interviews.” 5

“Partners. Not crew. Partners.” 17

“We’ll make the rules together, all of us.” 122