In the original story, Ace really did act like an impulsive child, and in the end, his impulsiveness dragged his beloved Pops, Whitebeard, to his death as well.
But the whole thing actually started with Blackbeard. He was the cause of everything that followed. Ace had only done what he should have done, and Whitebeard had tacitly allowed it. There was no saying who was right or wrong, because the matter itself could not be judged in those terms.
Speaking of Blackbeard, after the fright Su Yu had given him that day, he had been thinking about one thing: if he followed his original plan, killed Whitebeard, and seized the strongest fruit, the Tremor-Tremor Fruit, would the power of two fruits let him put up a fight against Su Yu?
In theory, a person could only eat one Devil Fruit in their lifetime. If they insisted on eating a second, the result would be, bang-they would be scattered evenly over the surrounding ground. Blackbeard, however, was different, because he was born a mutant with two hearts! The world really was full of wonders.
Moreover, his Dark-Dark Fruit possessed an extremely vicious ability: stripping other people of their fruit powers and then granting them to someone else. This fulfilled the necessary and sufficient conditions for stealing Whitebeard's power.
The most galling part was that, because he had two hearts, Blackbeard possessed an ability that was practically cheating: he did not need to sleep! That gave him twice as much time as everyone else! Now that was making perfect use of every minute and second!
To be honest, he had never figured out the technique Su Yu had used to seal his ability back then. Still, he felt that the stronger an ability was, the greater its limitations might be, so Su