Ace

Biodata

Feature	Details
Name	Ace (艾斯)
Alias(es)	Fire Fist Ace; Bearer of Flame; Flame D inheritor
Gender	Male
Affiliation	Whitebeard Pirates; Lin Ye Alliance; core Guardian team
Occupation/Role	Pirate; 2nd Division Commander of the Whitebeard Pirates; Flame Key holder
Status	Unknown; Void Energy eroded his body and increasingly contested his consciousness 391 393 396

Power Progression

Stage / Realm / Level	Chapter	Notes
Fire Fist's latent Sealing Power identified	136, 138	Ace realizes Fire Fist resonates with the Golden Blade; Lin Ye confirms that the technique contains previously sealed power capable of affecting Devil Fruit abilities.
Golden Flame: Seal	148	While suppressed and badly wounded at Morgan Island, Ace awakens gold-and-crimson flames that remain active under Voidbringer suppression.
D-shaped Mark awakened	181	A glowing D-shaped mark appears on his right palm, later serving as the activation key for Ancient Kingdom mechanisms.
Flame Emperor Armor activated	193, 198	The Flame Seed Core recognizes Ace as a Flame D inheritor; the armor refines his fire into azure True Flame.
Emperor Domain unlocked	199	The Flame Seed Stone deploys an independent True Flame space, slowing Gandalf and revealing memories of ancient flame warriors.
Emperor Flame Storm mastered	203, 204	Ace synchronizes with the Flame Seed and releases a colossal True Flame fire dragon; the damaged armor begins repairing itself.
Flame Key recognized	212, 219	Rayleigh identifies the Flame Seed Stone as the Flame Key; its resonance with the Dawn Blade and Time Tuning Fork helps stabilize a dimensional disturbance.
Energy Resonance with Lin Ye	250, 251	Resonance between the Flame Key and Dawn Blade creates a mental connection, enabling shared emotions, thoughts, memories, and route-sensing.
Pattern Bearer / Violet Flame	276, 278	His reopened wound becomes a complete purple rune circuit; he fully controls purple flames and helps form the Triple Dimensional Barrier.
Sacred Flame	316	By merging Watcher power with his flames, Ace produces pure white Sacred Flame that can purify Void Contamination and rekindle the World Tree Seed.
Void Flame	391	Void Energy grants blackish-purple flames that can burn matter and souls, but threatens to consume his identity within three hours.

Background

Alliance and the Sealing Power

Ace initially serves as a major fighter within the Whitebeard Pirates, holding the position of 2nd Division Commander. He later works with Lin Ye's alliance during its conflict with the World Government and reports that his Fire Fist technique reacts to the Golden Blade's Sealing Power 136 181.

During the assault on Morgan Island, Ace leads allied forces against a Science Force unit equipped specifically to neutralize flame users. The Voidbringer severely disrupts his Devil Fruit power, but he refuses to abandon the operation. Recalling Lin Ye's teachings, he awakens the golden sealing flame and breaks through the suppression 148.

He destroys Morgan Island's Voidbringer control center, though the resulting tsunami devastates the area and leaves him severely injured and unconscious 149.

Ancient Legacy

After traveling with Lin Ye, Sabo, and Robin to Moonlight Island, Ace learns of the Ancient Kingdom, the Void Visitors, and the D Clan's role in preserving the truth. He returns to Whitebeard to report these revelations and is entrusted with finding ancient weapon blueprints on Dusk Island 176 181 182.

A D-shaped mark manifests on Ace's palm and guides him through Dusk Island's ancient systems. The mark opens an Ancient Kingdom gate, where he encounters the damaged Guardian KS-7 and chooses to help it fight the World Government's Truth Eradication Squad 181 187 188.

KS-7 identifies Ace as a chosen bearer and leads him to the Flame Seed Core. The core recognizes him as a compatible Flame D inheritor and reveals the Flame Emperor Armor, an Ancient Kingdom weapon built to resist Void invasion 193 198.

Appearance

Ace's most distinctive features are tied to his inherited power and the changes caused by Void Energy.

• A glowing D-shaped Mark is engraved on his right palm; it reacts to Ancient Kingdom devices and runes 181 187.
• The Flame Emperor Armor is deep crimson with flowing golden runes and a red Flame Seed Stone set into its chestplate 193.
• Void corruption leaves a blackish-purple scar on his chest, with spreading marks and veins eventually covering much of his body and face 391 393.
• His flames have manifested in several forms: gold-and-crimson sealing fire, azure True Flame, white Sacred Flame, violet Pattern Bearer flame, and blackish-purple Void Flame 148 198 316 391.

Personality

Ace is resolute under pressure and repeatedly places allies ahead of his own safety. At Morgan Island, he continues fighting despite Voidbringer suppression and severe injuries rather than abandon the assault or the soldiers depending on him 148 149.

His strongest motivation is protecting those he considers family. He risks his life to hold back enemies while Luffy connects with the Anchor Stone, later agrees to merge life essences with Luffy to defend the World Tree Seed, and takes a fatal strike intended for Lin Ye 269 327 382.

Even after gaining Void Flame, Ace refuses Azazel's offer to join the Void Empire. As the corruption worsens, he consciously resists its murderous impulses and insists that his identity remains his own 391 393.

Abilities & Skills

Fire Fist and Sealing Flame

Ace's primary flame technique possesses an ancient Sealing Power that was initially dormant.

• His Fire Fist resonates with Lin Ye's Golden Blade and can interfere with Devil Fruit abilities 136 138.
• Under Voidbringer suppression, he awakens Golden Flame: Seal, producing golden-and-crimson fire independent of ordinary Devil Fruit output 148.
• His combat style allows him to transform into flame, launch high-speed attacks, and pierce defensive lines during large-scale assaults 148 268.

Flame Emperor Armor

The Flame Emperor Armor is an Ancient Kingdom combat system designed exclusively for Flame D inheritors.

• The armor has a recorded 98.7% compatibility with Ace 198.
• Its Flame Seed Stone converts his ordinary fire into True Flame, an azure energy capable of crossing dimensions and burning Void Matter 198.
• Emperor Flame Wall creates a defensive barrier of True Flame, though powerful Void sword aura can breach and damage it 198.
• True Flame Strike condenses True Flame around his limbs for high-density melee attacks 198.
• Emperor Domain creates a True Flame space in which Ace has absolute control over the refined flames 198 199.
• Emperor Flame Storm manifests as a massive True Flame vortex and fire dragon, fueled by the armor's awakened inheritance 203 204.

Flame Key, Runes, and Resonance

Ace is one of the holders of the seven keys needed to repair the Dimensional Barrier.

• His D-shaped Mark activates Ancient Kingdom gates, laboratories, and control systems 187 193.
• The Flame Key resonates with Lin Ye's Dawn Blade, allowing the two to share emotions, memories, and fragments of thought 238 250.
• Their Energy Resonance lets them perceive ancient runes and identify safer routes through distorted dimensional terrain 251.
• As a Pattern Bearer, Ace can manifest violet flames and use his rune circuit to resist interference from the Five Elders' power 276 278.

Sacred Flame

After receiving the Watchers' inheritance, Ace merges their power with his flames at the level of life essence.

• Produces pure white Sacred Flame, distinct from his prior Devil Fruit fire 316.
• Can purify Void Contamination 316.
• Can reignite the life force of the World Tree Seed 316.

Void Flame

Void Energy invades Ace after he saves Lin Ye from Abaddon, granting him a destructive but unstable power.

• His blackish-purple Void Flame warps space and can burn both material objects and souls 391.
• He can use Void Karmic Fire and Void Hellfire: Chain Explosion in combat 393 396.
• The power has a severe limit: the Star Guardians can suppress the corruption only temporarily, and Ace estimates he can retain normal consciousness for no more than three hours 391.
• The erosion drives him toward violent impulses and can allow Void consciousness to take over his body 393 396.

Equipment / Weapons / Items

• Flame Emperor Armor — Ancient Kingdom armor powered by the Flame Seed Stone; refines Ace's flame power into True Flame 193 198.
• Flame Seed Stone / Flame Key — Key artifact recognized by Rayleigh as the Flame Key; essential to the seven-key effort to repair the Dimensional Barrier 212 225.
• Tidal Compass — Hexagonal Ancient Kingdom navigation device given by Whitebeard; guided Ace's speedboat safely through storms en route to Dusk Island 187.
• KS-7 core component — The Guardian's preserved consciousness and energy-storage crystal, retrieved by Ace after KS-7's sacrifice 212.
• Flame Armor — Space-capable equipment forged from Mars's flame seeds, allowing continuous combustion in a vacuum and mounting a chest flamethrower stronger than his original Fire Fist 362.

Relationships

• Lin Ye — Closest friend and fellow Guardian. Their Flame Key–Dawn Blade resonance links their minds and improves their combat coordination; Ace repeatedly risks himself to protect Lin Ye 250 278 382 394.
• Monkey D. Luffy — Sworn brother. Ace shields Luffy during the Anchor Stone ritual and later agrees to merge their powers to protect the World Tree Seed 269 327.
• Sabo — Sworn brother. Their reunion helps establish communication between the Revolutionary Army and Lin Ye's alliance 136.
• Whitebeard — Captain and father figure, whom Ace calls “Pops.” Whitebeard entrusts him with Dusk Island's mission and the responsibility of carrying the D Clan's legacy 181 182.
• Gol D. Roger — Biological father. Roger's former crewmates identify Ace as Roger's son and explain that his bloodline was foreseen as vital to resisting the Void crisis 212.
• Silvers Rayleigh — Roger's first mate, who waited for the Flame Key's bearer and directs Ace toward the seven-key mission 212.
• KS-7 — Ancient Kingdom Guardian and ally. KS-7 recognizes Ace's mark, guides him to the Flame Emperor Armor, and sacrifices itself to protect the Flame Seed holder 188 193 203.
• Azazel — Void general who attempts to recruit Ace after his Void Flame awakening; Ace rejects the offer 391.

Notable Quotes

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

“Even if darkness devours me in the end, at least I can fight during the time I have.” 391

“You're facing the will of the Ancient Kingdom!” 188