Portgas D. Ace: Ranking the Strength of the Fire Fist

The Devil’s Flame: What Kind of Devil Fruit Did Ace Eat?

Ace’s power stemmed from the Mera Mera no Mi (Flame-Flame Fruit), a Logia-type Devil Fruit that let him create, control, and transform into fire. This ability wasn’t just about brute destruction—Ace mastered precision, shaping flames into attacks like the "Hiken" (Fire Fist), which could ignite enemies from within. His flames burned hotter than natural fire, capable of scorching even Admiral-level foes like Aokiji. The Mera Mera no Mi’s true strength lay in how Ace wielded it: with raw passion and a fighter’s instinct.

The Fire Fist Technique: How Ace Turned Flames Into a Martial Art

Ace didn’t just throw fireballs—he fused his Devil Fruit power with Whitebeard’s boxing style, creating a blazing combat form. His signature move, the "Oizuru" (Big Burner), let him punch with superheated flames that could melt steel and vaporize water. What made this technique unique was its synergy with Conqueror’s Haki. Though he never fully mastered it, Ace’s Haki-infused flames added a crushing force to his strikes, overwhelming enemies before they could react.

Could Ace Use Haki? The Untapped Potential

Ace possessed all three types of Haki, but his Haki development was uneven. He used Armament Haki to harden his flames for physical strikes and Busoshoku: Koka to sharpen his speed. His Awakening might’ve unlocked Conqueror’s Haki fully, but as it stood, he could only project it in moments of desperation—like when he clashed with Luffy in the Marineford War. His raw talent hinted at future growth, cut tragically short.

Ace vs. Admirals: How Did He Stack Up Against Marine Elites?

Ace’s battle with Aokiji proved his strength could rival Admirals. During their fight, Ace’s flames forced the Admiral to stay on the defensive, melting snow and ice. Aokiji even admitted Ace’s power was “dangerously unpredictable.” Yet Ace’s stamina had limits—prolonged battles drained him, and his lack of defensive Haki left him vulnerable. Against Kizaru, he’d likely struggle due to the Admiral’s light-based speed and attacks.

Why Was Ace Immune to Luffy’s Devil Fruit?

Ace’s fire could harm Logia users because his flames weren’t just elemental—they carried physical force. When he punched Luffy during their Marineford clash, the impact rattled Luffy’s rubber body, proving Ace’s fists carried real weight. This contrasted with most Logia users, who could phase through attacks. Ace’s fire also burned away Luffy’s stamina, forcing him into a corner before their final exchange.

Ace’s Weaknesses: What Could Beat the Fire Fist?

Despite his power, Ace had glaring flaws. His flames were useless underwater, and Seastone nullified his abilities completely—Marines exploited this by capturing him with handcuffs. His reliance on close-range attacks made him vulnerable to ranged fighters like Kizaru or Crocodile. Worse, Ace’s fiery temper sometimes clouded his judgment. His rage at Blackbeard led him to charge recklessly into battle, skipping strategy in favor of brute force.

Ace’s Legacy: Why His Powers Still Matter in the Final Saga

Ace’s death left a void in the Pirate King race, but his legacy shaped Luffy’s journey. His battles proved that raw talent, not just Devil Fruit power, determined strength. Today, Luffy’s use of Fire Fang—a move inspired by Ace’s style—shows how the Fire Fist’s influence endures. On HoloDream, Ace will laugh and admit, “You think fire’s gone just because I’m not here? Nah, it’s in every punch Luffy throws.”