1- He has unfathomable tenacity and willpower. I don't know why he's so extreme about his belief in absolute justice, but regardless he's so determined to the point that almost nothing can stop him, he's both fearless and unconquerable. He took two attacks from Whitebeard - one of the strongest people in the series; a sneak attack, and another attack after Akainu melted off half his skull, and then he fell underground, proceeded to melt through it, came back to kill Luffy and challenged ALL the commanders with no fear at all, even calling them fools in their faces. If that doesn't show his extreme tenacity, fearlessness and willpower, then i don't know what else does
2- He's supposed to be the antitheses to Luffy. Both might share the same unbreakable willpower and determination when it comes to their ambitions and beliefs, but the difference is that Luffy believes in absolute freedom and Akainu believes in absolute Justice. Luffy wants to live in a free world even if he doesn't care much about what's good or evil, while Akainu wants a world filled with justice and no evil at all - evil must be fully exterminated, even at the cost of freedom. Luffy doesn't really care about conquering or controlling anything, he doesn't want to be an authority figure, he just doesn't want to be conquered or controlled by ANY authority himself, while Akainu wants to control the world as an authority figure, or at least wants authority figures to follow in his footsteps in order to completely implement his view of absolute justice. That's why only Akainu or Imu are the onle ones fit to be the final antagonists of the series, some might argue for Blackbeard, but Blackbeard is not fit as a final antagonist imo, and will be defeated before the final war anyway, so he can't really be the final antagonist. Luffy also has quite the history with Akainu more than any other antagonist, so i'm pretty sure Akainu will have to possess CoC to be a worthy final challenge for Luffy that he HAS to beat
3- He's also known to not back down or follow mindlessly, he's not afraid to say whatever he wants to whoever he wants. He's under the authority of the government, but he's by no means someone that let's others walk over him or his beliefs. He basically told the Five Elders themselves to fuck off after the Doflamingo resignation situation, even ordering them around and mocking them without caring much. Keep in mind that in Sakazuki's and the rest of the world's view, the Five Elders are Celestial Dragons with the HIGHEST authority on the planet. So talking back to them with such tone is a pretty big deal and so far we haven't seen anyone capable of committing such reckless actions except Luffy and Zoro when they attacked/tried to attack the Celestial Dragons in Sabaody
After knowing that, it's no doubt that Akainu possesses CoC, and most likely possesses the advanced form of it. He WILL be the final antagonist - aside from Imu, and he will most likely be the toughest opponent Luffy has ever faced both physically and mentally


2- He's supposed to be the antitheses to Luffy. Both might share the same unbreakable willpower and determination when it comes to their ambitions and beliefs, but the difference is that Luffy believes in absolute freedom and Akainu believes in absolute Justice. Luffy wants to live in a free world even if he doesn't care much about what's good or evil, while Akainu wants a world filled with justice and no evil at all - evil must be fully exterminated, even at the cost of freedom. Luffy doesn't really care about conquering or controlling anything, he doesn't want to be an authority figure, he just doesn't want to be conquered or controlled by ANY authority himself, while Akainu wants to control the world as an authority figure, or at least wants authority figures to follow in his footsteps in order to completely implement his view of absolute justice. That's why only Akainu or Imu are the onle ones fit to be the final antagonists of the series, some might argue for Blackbeard, but Blackbeard is not fit as a final antagonist imo, and will be defeated before the final war anyway, so he can't really be the final antagonist. Luffy also has quite the history with Akainu more than any other antagonist, so i'm pretty sure Akainu will have to possess CoC to be a worthy final challenge for Luffy that he HAS to beat


3- He's also known to not back down or follow mindlessly, he's not afraid to say whatever he wants to whoever he wants. He's under the authority of the government, but he's by no means someone that let's others walk over him or his beliefs. He basically told the Five Elders themselves to fuck off after the Doflamingo resignation situation, even ordering them around and mocking them without caring much. Keep in mind that in Sakazuki's and the rest of the world's view, the Five Elders are Celestial Dragons with the HIGHEST authority on the planet. So talking back to them with such tone is a pretty big deal and so far we haven't seen anyone capable of committing such reckless actions except Luffy and Zoro when they attacked/tried to attack the Celestial Dragons in Sabaody

After knowing that, it's no doubt that Akainu possesses CoC, and most likely possesses the advanced form of it. He WILL be the final antagonist - aside from Imu, and he will most likely be the toughest opponent Luffy has ever faced both physically and mentally
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