Ace

Biodata

Feature	Value
Name	Ace
Alias(es)	Fire Fist Ace
Gender	Male
Affiliation	Whitebeard Pirates; later cooperates with the Pirate Alliance and Revolutionary Army
Occupation/Role	Whitebeard Pirates Second Division Commander; Flame Key bearer; one of the Three Guardians
Status	Void-corrupted; his ultimate fate remains unresolved after his human consciousness is overwhelmed by Void Energy 395 396
First Appearance	129

Power Progression

Stage / Realm / Level	Chapter	Notes
Fire Fist gains a Sealing Power resonance	138	Ace discovers that his signature technique resonates with Lin Ye's Golden Blade and can affect Devil Fruit abilities.
Golden Flame	148	Under Voidbringer suppression and anti-flame weaponry, Ace awakens gold-and-crimson flames that restore and exceed his previous fighting power.
Flame Emperor Armor activation	193	His D-shaped mark allows him to activate the Flame Seed Core and claim the Ancient Kingdom's armor for flame users.
True Flame / Flame Emperor Armor core functions	198	The Flame Seed Stone purifies his flames into azure True Flame, which can burn Void matter. He gains Emperor Flame Wall, True Flame Strike, and Emperor Domain.
Emperor Domain	199	Ace deploys a True Flame domain that slows Gandalf's movements and reveals memories of ancient Flame D warriors.
Flame Warrior inheritance	203 204	Azkaban identifies Ace as heir to the Flame Warriors and teaches him True Flame's final art, Emperor Flame Storm.
Flame Key resonance	232 247 248	The Flame Key strengthens his flame control, burns Void Energy, improves short-term recovery, and resonates with Lin Ye's Dawn Blade to clear Void mist and locate safe routes.
Rune-enhanced purple flame	276 278	Rune Energy transforms his flames violet; Purgatory—Rune Judgment annihilates a Deathbringer ship, and his fully purple flames help form the Threefold Dimensional Barrier.
Holy Flame	316	By completely fusing Watchers' power with his flames, Ace creates Holy Flame, capable of purifying Void Corruption and rekindling the World Tree Seed's life force.
Void Flame awakening	391	A chest wound becomes a Dimension Anchor, granting blackish-purple Void Flame capable of burning matter and souls, but exposing Ace to accelerating corruption.
Voidified transformation	395	Void Energy overwhelms Ace's consciousness; he transforms into a three-meter-tall Void-corrupted form wielding Void Hellfire.

Background / History

Ace serves as the Whitebeard Pirates' Second Division Commander and is entrusted with information concerning the Ancient Kingdom, the Clan of D., and the threat of the Void Visitors. After returning to Whitebeard's ship, he personally briefs the division commanders on what he learned, recognizing that the coming conflict concerns humanity's survival rather than ordinary piracy 181 183.

His connection to the Ancient Kingdom becomes visible when a glowing D-shaped mark appears on his right palm after a dream of Gol D. Roger and a golden city gate. Guided by the mark and Whitebeard's Tidal Compass, he travels alone to Dusk Island, where the mark opens the island's ancient mechanisms and identifies him to Guardian KS-7 as a bearer of the mark 181 187 188.

Within Dusk Island's ancient armory, Ace activates the Flame Seed Core and is recognized as the chosen inheritor of the Flame Emperor Armor. The armor's Flame Seed Stone purifies his ability into True Flame and reveals his lineage as an heir to the Flame Warriors of the Ancient Kingdom 193 198 203.

Ace later becomes the confirmed bearer of the Flame Key. Its resonance with Lin Ye's Dawn Blade allows the pair to resist Void erosion, perceive routes through the dimensional mist, and participate in the ritual at Laugh Tale 219 238 247 248 254.

Appearance

The most consistently documented feature of Ace is the glowing D-shaped mark on his right palm. It reacts to Ancient Kingdom ruins, unlocks sealed mechanisms, and interfaces with the Flame Emperor Armor 181 187 193.

• The Flame Emperor Armor is deep crimson with flowing golden patterns and a red Flame Seed Stone set in its breastplate 193.
• When wielding True Flame, his fire becomes nearly transparent azure-blue 198.
• During Rune Energy breakthroughs, his flames turn deep violet 276 278.
• Void corruption leaves a blackish-purple, spiderweb-like mark across his chest and eventually spreads over his body 391 393.
• In his fully Voidified state, he grows to roughly three meters tall, develops claws and fangs, and is engulfed in Void Hellfire 395.

Personality

Ace is direct, courageous, and strongly protective of those he considers family or comrades. He repeatedly chooses to fight despite severe injuries, from assisting Lin Ye in opening the central temple to standing against Gandalf after the Flame Emperor Armor is damaged 171 199 203.

He also possesses a strong sense of responsibility. He takes the initiative to explain the Void Visitors' threat to the Whitebeard Pirates, seeks the other key holders, and accepts dangerous resonance attempts alongside Lin Ye when the fleet needs a route through the Void mist 181 213 247.

His resolve is tempered by self-sacrifice. Ace shields Lin Ye from Abaddon's fatal strike and later asks Lin Ye to kill him if Void corruption completely takes control, fearing that his body could be used to harm innocents 382 394 396.

Abilities & Skills

Fire Fist and Sealing Power

Ace's signature Fire Fist is a flame-based combat technique that develops an affinity for ancient Sealing Power.

• Its resonance with the Golden Blade can interfere with Devil Fruit abilities 138 139.
• It breaks through Morgan Island's outer defenses and allows Ace to fly as a streak of fire 148.
• Specialized heat-absorbing weapons and Voidbringer suppression can destabilize and severely weaken his flames 148.
• Its awakened Golden Flame state functions despite Voidbringer suppression 148.

Flame Emperor Armor

An Ancient Kingdom combat suit reserved for compatible Flame D inheritors.

• The armor has a recorded compatibility of 98.7% with Ace 198.
• Its Flame Seed Stone converts ordinary flames into True Flame and channels that energy through the armor for offense and defense 198.
• The armor can be damaged by sufficiently powerful Void-infused attacks, though the Flame Seed Stone can restore its systems during an awakening 199 204.

True Flame

Azure flame purified by the Flame Seed Stone and developed specifically to oppose Void incursions.

• Can cross dimensions and burn Void matter 198.
• Emperor Flame Wall creates a defensive True Flame barrier 198.
• True Flame Strike concentrates True Flame into high-density attacks through Ace's fists and feet 198.
• Emperor Domain creates an independent True Flame space in which Ace has absolute control over the flames 198 199.
• Emperor Flame Storm manifests as a gigantic blue fire dragon and is the final art of the Flame Warrior inheritance 203 204.

Flame Key Resonance

The Flame Key is a fiery red gemstone that can change size and serves as one of the seven keys needed to repair the Dimensional Barrier.

• Enhances Ace's flame control and can burn Void Energy 232.
• Temporarily boosts recovery ability 232.
• Resonates with Lin Ye's Dawn Blade to repel purple mist and expose hidden paths 247 248.
• Forms part of the seven-key ritual at Laugh Tale, where Ace places it in the Flame pillar 254.

Rune, Starfire, and Holy Flame

Ace later combines external ancient powers with his flame ability.

• Purgatory—Rune Judgment fires a column of violet flame that disintegrates a Deathbringer ship rather than merely burning it 276.
• Starfire: Fusion produces a purple defensive barrier that disintegrates Void soldiers, though maintaining it rapidly drains his energy 285.
• The Starfire Shield amplifies his starfire and can form Purification Light to resist Void erosion 296 302.
• Holy Flame can purify Void Corruption and restore the World Tree Seed's life force 316.

Void Flame

A destructive power awakened through the Dimension Anchor wound in Ace's chest.

• Void Flame twists surrounding space and can burn both matter and souls 391.
• Ace can retain normal consciousness for only a limited period while using it; he estimates a maximum of three hours before complete consumption 391.
• Its corrosion produces intrusive urges to slaughter and destroy, which Ace repeatedly struggles to reject 393.
• Once fully Voidified, he unleashes attacks such as Void Hellfire: Destruction Impact and Void Karmic Flame: Chain Explosions 395 396.

Equipment / Weapons / Items

• Flame Emperor Armor — Ancient Kingdom armor that purifies and amplifies Ace's flames 193 198.
• Flame Seed Stone — The armor's core crystal; produces True Flame and responds to Ace's D-shaped mark 198.
• Flame Key — A shapeshifting fiery gemstone used in the seven-key ritual and capable of burning Void Energy 232 254.
• Tidal Compass — Ancient navigation device given by Whitebeard; guided Ace safely through storms and dangerous New World currents to Dusk Island 187.
• Starfire Shield — Protective shield that resists Void erosion and amplifies starfire into Purification Light 296.

Relationships

• Lin Ye — Partner and close friend. Their Flame Key and Dawn Blade repeatedly resonate, and Ace risks himself to protect Lin Ye from Abaddon 247 248 382 391.
• Monkey D. Luffy — Brother. Ace trusts Luffy's judgment, fights beside him, and is willing to merge their life essences rather than abandon him 274 327.
• Sabo — Sworn brother and longtime ally. Sabo reports Ace's discovery about Fire Fist's Sealing Power, while the two coordinate in major battles and ancient-ruin missions 136 138 275.
• Whitebeard — Captain and father figure addressed as “Pops.” Whitebeard entrusts Ace with the Tidal Compass and shares intelligence on the Void Visitors 181 183 187.
• Gol D. Roger — Father; Roger's legacy, bloodline, and role as a former guardian of the dimensions shape Ace's mission 212 252.
• Silvers Rayleigh — Guide to Ace's inherited role. Rayleigh recognizes him as the Flame Key bearer and supports his decision to seek the remaining keys 212 213.
• KS-7 — Ancient Kingdom guardian who recognizes Ace's D mark, guides him through Dusk Island, and sacrifices itself to protect the Flame Seed holder 188 193 203.

Story Role / Major Arcs

Golden Blade and Fire Fist Resonance

Ace reports that Fire Fist responds to Lin Ye's Golden Blade, revealing a Sealing Power that can affect Devil Fruit abilities. He and Sabo keep the discovery restricted to prevent immediate World Government intervention 136 138.

Dusk Island and the Flame Emperor Armor

Guided by his D mark, Ace reaches Dusk Island, allies with KS-7 against the Truth Eradication Squad, and gains access to an Ancient Kingdom armory. There, he activates the Flame Emperor Armor and inherits True Flame 187 188 193 198.

Flame Key Bearer

Ace learns from Rayleigh and Comps that Roger anticipated the Dimensional Barrier crisis and that his bloodline is tied to resisting it. He joins Lin Ye and Ramon in Alabasta, where the three keys stabilize a weakening barrier 212 213 219.

Seven Keys and Laugh Tale

As Flame Key bearer, Ace joins the alliance seeking Laugh Tale, shares a consciousness resonance with Lin Ye, and helps place the Flame Key during the seven-key ritual 238 248 252 254.

Three Guardians and Void War

Ace is confirmed alongside Luffy and Lin Ye as one of the Three Guardians. He helps create the Threefold Dimensional Barrier, protects Aurora Island from Void Creatures, and proves the group's intentions to the corrupted Abyss Guardian 278 290 302.

Void Corruption

Ace intercepts Abaddon's attack on Lin Ye, receiving the chest wound that develops into a Dimension Anchor. Though it grants Void Flame, the power gradually consumes his consciousness until he becomes a Voidified threat whom Lin Ye believes may still retain a fragment of his true self 382 391 395 396.

Notable Quotes

“We're brothers, aren't we? No matter what happens, we'll be together.” 327

“I'm Ace, not a slave of the Void!” 393

“Don't you dare hurt my brother!” 382