Luo Yi

Biodata

Feature	Information
Name	Luo Yi Amos (Luo Yi; 洛伊)
Alias(es)	Rooster — masked identity and alleged high-ranking cadre of the Twelve Zodiacs 14 17
Gender	Male
Affiliation	Marines; Detention Unit; disciple of Zephyr 1 27
Occupation/Role	Marine Major and Detention Unit officer; formerly a Captain 1 17
Status	Active
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Fruit Encyclopedia — 2 Fruit Slots	2	Initially documented with the Great Rhinoceros and Great Buddha abilities equipped at LV1.
Fruit Encyclopedia — 3 Fruit Slots	7	Reached 20 recorded fruits after analyzing Alan's Slice-Slice Fruit; gained a third slot.
Wind God Dragon Fruit — acquired / LV3 documented	11 25	Absorbed an Ancient Zoan Dragon-Dragon Fruit from a Seastone chest; later equipped its Wind God Dragon Form at LV3.
Glimmer-Glimmer Fruit — LV2	18	Partial elementalization enabled Rooster to survive Commodore Lan Li's apparent decapitation.
Great Rhinoceros Fruit and Strong-Strong Fruit — LV2	25	Used alongside the Wind God Dragon Fruit during Zephyr's test of his physical strength.
Fruit Encyclopedia — 4 Fruit Slots	40	Obtained twelve additional Devil Fruit records during the Alabasta operation, unlocking a fourth standard slot.
Slice-Slice Fruit — LV3	42	Loaded for steel-level body hardness while adapting to pressure 5,000 meters below sea level.
Great Buddha Fruit — LV3	47	Spent 2 billion Belly to raise the Human-Human Fruit, Great Buddha Form from LV1 to LV3; used its shockwaves to split the sea.

Background

Luo Yi is a transmigrator whose Fruit Encyclopedia records Devil Fruit abilities from nearby users. He joined the Marines and deliberately chose the low-status Detention Unit because it offered safety, regular access to Ability Users, and prisoner-escort assignments. Over eight years, he recorded nineteen Devil Fruits through Marine contacts and captured criminals. 2

Although he rejects the Marines' institutional idea of “justice” as subservience to the World Government, Luo Yi retains a personal moral line. He once pursued pirates across an entire sea area to recover money stolen from a girl needing her mother's medical treatment, and later acted against the Kingdom of Nysmal's slave-trading operation. 3 4 5 9

His need for Belly to enhance recorded abilities led him to operate covertly outside his Marine identity. After acquiring the Slice-Slice Fruit, he created controllable clones to pursue wealth while maintaining his place in the Detention Unit. 7

Appearance

Luo Yi normally presents himself as a Marine officer. When acting covertly, he conceals his identity with a Rooster Mask. 3 9 14

• In his Wind God Dragon human-beast form, he develops dragon claws, wing membranes, reverse-jointed beast legs, and a thick tail. 14
• His Glimmer-Glimmer Fruit enhancement can turn fatal wounds into golden particles of light before regenerating his body. 15
• Great Buddha power manifests as golden radiance around his body and fists. 47

Personality

Luo Yi is calm, calculating, and strongly motivated by security, freedom, and the resources needed to improve his Fruit Encyclopedia. He considers strength essential to survival, yet prefers the Detention Unit's stability over prestige or rapid promotion. 1 2 16

He is pragmatic rather than conventionally heroic. Luo Yi rescued Nysmal's slaves but refused to start a direct conflict with the World Government to retrieve Keli from a Celestial Dragon, offering assistance only if an opportunity arose. 9

Despite his detached attitude toward Marine ideology, he is protective of the Detention Unit personnel he has served with for years. Hanafuda's attack on Morr and Lanster provoked him into retaliating against a Shichibukai. 49 50

• He frequently drinks cola and considers being unable to drink it during confinement a serious punishment. 4
• He maintains a deliberately unremarkable public image while hiding the scale of his Devil Fruit powers. 1 23
• He is willing to endure extreme training when it offers genuine growth, repeatedly entering deadly deep-sea currents under Zephyr's supervision. 43

Abilities & Skills

Fruit Encyclopedia

Luo Yi's system can record a Devil Fruit after he spends time near its user; witnessing the ability in use accelerates analysis. Recorded powers begin at LV1, while directly absorbed physical Devil Fruits grant their corresponding ability at LV3. 2

• He can equip several recorded abilities at once through Fruit Slots. 2 7 40
• Belly or equivalent treasure permanently upgrades recorded abilities; temporary upgrades cost less but last one hour. 2
• Unlike ordinary Devil Fruit users, his system-granted powers are not restricted by seawater or Seastone. 2
• He had recorded the Devil Fruit abilities of the three Admirals and Fleet Admiral Sengoku by the time the story began. 2
• A future Special Fruit Slot, unlocked after collecting sixty fruits, is associated with “Fruit Fusion.” 40

Slice-Slice Fruit and Clones

The Slice-Slice Fruit allows Luo Yi to create perfect, independently acting copies of himself under his shared control. 7

• A clone copies Luo Yi's equipped Devil Fruit abilities, though the Slice-Slice Fruit permanently occupies one of the clone's slots. 7
• He uses masked clones to conduct operations and acquire Belly without exposing his Marine identity. 7 17
• At LV3, the fruit can harden his body to steel and transform body parts into blades. 42

Zoan Transformations

Luo Yi stacks Zoan-based physical enhancement with other powers to achieve exceptional speed, strength, resilience, and recovery. 2 3 25

• Great Rhinoceros Fruit — provides major physical and leg-strength enhancement. 3 10
• Snow Rabbit and Gray Mouse Fruits — improve speed, hearing, and agility. 3
• Strong-Strong Fruit — amplifies his musculature and combines effectively with Zoan physicality. 2 3
• Wind God Dragon Fruit — grants a dragon-like human-beast form, flight capability, exceptional vitality, and regeneration when paired with elementalization. 11 14 15 18
• Great Buddha Fruit — greatly enhances physical power and produces destructive shockwaves. 3 47

Wave Fist

Luo Yi's signature martial art creates shockwaves through “invisible air fluctuations,” an explanation he uses to conceal his Fruit Encyclopedia powers. 3 26

• Wave Fist: Infinite Light — a Great Buddha-enhanced shockwave powerful enough to split the sea and overwhelm Ace's Fire Fist. 47
• Ice Wave Fist: Eternal Frost — freezes the sea around an enemy fleet. 49 50
• Flame Wave Fist: Boil the Sea — follows the ice attack with intense heat, destroying Hanafuda's frozen fleet. 50
• He attributes his elemental Wave Fist variations to inspiration from Fish-Man Karate and Wano's Foxfire Style. 50

Six Styles

Luo Yi has learned and can proficiently use four of the Six Styles: Soru, Geppo, Rankyaku, and Tekkai. 11

• Uses Soru for explosive bursts of speed in close combat. 14 25
• Uses Geppo for aerial mobility. 11 50
• Uses Rankyaku as a ranged cutting attack. 10 11
• Uses Tekkai as a defensive technique and has defeated opponents who relied on it. 10 11

Black Body Flow

Zephyr's personal martial discipline focuses on tempering and controlling every part of the body—skin, bones, muscles, organs, and blood—rather than concentrating power in a single limb. 40 43

• Luo Yi adapted to pressure at a depth of 5,000 meters and trained against the Marine Giant Gyre's “Black Snake” currents. 41 42 43
• The training improves his permanent physical foundation and body control even after he changes Fruit loadouts. 48
• He has sensed the presence of Haki within himself but has not yet learned to consciously use it. 43

Equipment / Items

• Fruit Encyclopedia — the system-book through which Luo Yi records, equips, and upgrades Devil Fruit abilities. 2
• Rooster Mask — used to conceal his identity during operations attributed to “Rooster.” 9 14
• Hourglass — used to monitor Devil Fruit analysis time while near Ability Users. 1 7
• Detention Unit warship — his unit's vessel was renovated by his subordinates to resemble a cola bottle, with “Loy Amos” displayed on its sail. 45

Relationships

• Smoker — fellow recruit and close friend; Smoker repeatedly tries to recruit Luo Yi as his Loguetown adjutant and believes Luo Yi should take a more prominent path in the Marines. 3 4 23
• Hina — Marine colleague who mediates Smoker's behavior and similarly argues that Luo Yi's strength should be used to change more than the Detention Unit. 3 16
• Vice Admiral Billoss — Detention Unit superior who supports Luo Yi, promoted him to Major, and initially considered him as a successor for Detention Unit manager. 4 17
• Zephyr — Luo Yi's master and direct mentor in Black Body Flow; Zephyr agreed to support Luo Yi's future place in the Detention Unit. 26 27 40
• Binz — Zephyr's disciple and Luo Yi's growing friend; he escorts Luo Yi to Training Room Zero and respects Luo Yi's dedication to the Detention Unit. 27 40
• Hans and Fal — Luo Yi's Detention Unit subordinates. They are loyal to him despite Hans's occasional ambition to replace him. 3 16 45
• Alan — captive Slice-Slice Fruit user whose ability Luo Yi records; Alan aids Luo Yi's deception by supplying the Marines with fabricated intelligence about the Twelve Zodiacs. 7 9 17
• Ace — captain of the Spade Pirates; Luo Yi fought him to test his upgraded Great Buddha power and potentially analyze the Flame-Flame Fruit. 46 47 49
• Hanafuda — Shichibukai whose attack injured Luo Yi's subordinates; Luo Yi retaliated and destroyed his fleet. 49 50

Story Role / Major Arcs

Nysmal and Master Port Incident

Luo Yi uncovered evidence that the Kingdom of Nysmal's merchant ship was engaged in slave trading. Acting behind the Rooster Mask, he freed the imprisoned slaves, killed Captain Aster, acquired an Ancient Zoan Devil Fruit, and targeted Celestial Gold stored on Arashit Island. 5 9 11 12

During the ensuing Master Port incident, Rooster fought Commodore Lan Li. After Lan Li seemingly decapitated him, Luo Yi survived through partial Glimmer-Glimmer Fruit elementalization and Ancient Zoan vitality. 14 15 18

The Twelve Zodiacs Cover Story

To prevent his covert operations from being traced back to him, Luo Yi created the fictional Twelve Zodiacs organization and arranged for Alan to provide the Marines with false intelligence about it. The World Government consequently identified Rooster as a wanted Mythical Zoan user with a 170 million Belly bounty. 17

Luo Yi was promoted to Major for his apparent actions as temporary commander during the Master Port crisis and for the intelligence supposedly delivered by his prisoner. 17

Alabasta and Zephyr's Training

Luo Yi's artificial-rainfall project in Alabasta and his expected transaction with King Cobra were projected to earn him more than 5 billion Belly. The operation also gave him twelve Devil Fruit records and unlocked a fourth Fruit Slot. 23 40

Following Zephyr's offer of apprenticeship, Luo Yi accepted while insisting on remaining in the Detention Unit. His subsequent Black Body Flow training transformed his physical foundation and allowed him to sense Haki. 27 40 43 48

Spade Pirates and Hanafuda

Luo Yi engaged Ace and the Spade Pirates, using Great Buddha Fruit LV3 and Wave Fist: Infinite Light to split the sea and heavily damage the Spade Pirates' ship. 46 47 48

When Hanafuda's pursuit of Ace damaged Luo Yi's warship and injured Morr and Lanster, Luo Yi attacked the Shichibukai's fleet with Ice and Flame Wave Fists, leaving only the broken flagship behind. 49 50

Notable Quotes

“I have my own path. And I'm already walking it.”
16

“I'm very calm, Hans. To be precise, I've never been this calm.”
49

“The stacking of Devil Fruits isn't as simple as one plus one—as long as you have a thorough enough understanding of enough Devil Fruits, even an LV1 Devil Fruit can unleash power beyond imagination!”
2

Trivia

• Luo Yi's public Marine identity is useful to him not only as protection, but also as a way to encounter and analyze more Devil Fruit users. 2
• He considers cola important enough that half a month without it is worse than Marine confinement itself. 4
• Zephyr initially believes Luo Yi is not a Devil Fruit user and interprets his abnormal strength and Wave Fist as extraordinary natural talent. 26