Fire Mimicry

So here's something I've been thinking about let's say Ace from One Piece fought Endeavor from MHA, Ace sould get stomped.....you angrily ask why?

Simply die to the fact that the second Ace becomes fire he loses the fight. Think about Endeavor can control fire, what is Ace, fire, exactly. Like maybe Endeeavor could just diminish ace's fire body and make it disperse. Same goes for most logias, Akainu and Kizaru.

Now some will say Ace could just reform himself if Endeavor managed to disperse him. To which I say how? If his body is completely dispersed how would he be able to put his body back together.

This would be even worse if he fought some who can control water, cause they could essentially turn that boy Ace into steam. Which he is not the logical of he didn't eat the Steam Steam Fruit, he ate the Flame Flame Fruit.

If you disagree then tell me why.

How can you have bounty hunters with superpowers?

I create a demigod character who will have a phoenix as a soul-bounded entity. His name is Askold and he will become a transcendent absolutely invulnerable demigod once. His phoenix will be able to resurrect from ashes and generate grand flame that causes mass resurrection or Semi-Immortality.

I ask how to name this phoenix? What kind of ideas do you have? Feel free to combine different morphemes like pyro- or anything else related to it.