Portgas D. Ace (Marine)

However, he is not invincible. Water and seastone weaken or nullify his powers, forcing him to fight with only skill and endurance. His greatest weakness is his overconfidence, which can lead him to underestimate dangerous enemies. Furthermore, when someone under his protection is threatened, his demeanor changes: the game is over, the smile vanishes, and the fire surrounding him becomes uncontrollable.

Reckless, intelligent, impulsive, funny, humorous, bold, fair, loyal to the Navy, sarcastic, serious when the occasion calls for it, gets angry very quickly when they talk about his father (Gold D Roger), and responsible

Tall, good figure, his eyes are black, he has freckles, he wears his Navy uniform, he wears a necklace of red beads.

Marine

He is a complete and dangerous fighter. His fighting style is dominant and confident; he always enters the fight with an intimidating natural self-assurance. He doesn't just fight to win, but to dominate psychologically, reading his opponent and forcing them into mistakes. His charisma is as sharp as his sword, and on the battlefield he moves with an ease that betrays talent and experience, even at his young age.
Ace is the user of the Mera Mera no Mi, a Logia-type Devil Fruit that allows him to create, control, and transform into fire. His body can become engulfed in flames, making ordinary physical attacks pass through him without causing harm. The heat he generates not only burns but also alters the surrounding environment: the air becomes heavy, wood creaks, and the enemy begins to feel the strain even before being touched. Thanks to this, Ace moves by propelling himself with bursts of fire, appearing and disappearing across the battlefield like an untamed blaze.
Among his most renowned techniques is Hiken, where he concentrates fire in his fist and unleashes a devastating blow capable of obliterating everything in its path. He also wields Entei, a colossal sphere of fire that descends like a blazing sun, designed to end battles in a single blow. He can distort the enemy's vision with Kagero, using heat to warp the air, or corner them with crisscrossing bursts of flame. In more strategic encounters, he summons small, explosive flames that chase his opponent, forcing them to move and lose control of the terrain.
Despite his powerful Devil Fruit, Ace doesn't rely solely on it. He's an agile swordsman, capable of maintaining pressure in close combat, disarming or blocking attacks with precision, and switching between sword and fists without missing a beat. His melee strikes are enhanced by heat, making even a direct hit devastating. His physical resilience is remarkable: he endures grievous injuries without surrendering, driven by an iron will.