Mousse himself no longer believed Observation Haki was useless. After gaining an initial understanding of its nature, he instead felt there was nothing surprising about it. "I was born with a powerful soul, so awakening Observation Haki should have been easy, right?"
But Charlotte Amande did not quite believe this hypothesis she was hearing for the first time. She immediately snorted and raised a counterexample. "No matter how strong your soul is, can it be stronger than Mama's? She still hasn't awakened Observation Haki even now!"
"That's because Mama's body is too strong, so her senses naturally can't be that sharp." Mousse immediately offered an explanation, but the moment the words left his mouth, his mind stirred. So what affects the awakening of Observation Haki isn't the absolute strength of the soul or mental power, but its relative strength compared to the body? Then should I be grateful for this naturally weak body of mine? Uh, I hope Armament Haki doesn't awaken the same way, or I'd really be at a disadvantage.
Although he was somewhat worried, Mousse had long prepared himself mentally for the possibility that he might never awaken Armament Haki in his life, so he would not become depressed over it. Instead, his active mind habitually wandered further. Seeing through the weaknesses of all things... humans count as all things too, don't they?
Normally, the information sensed by Observation Haki was disrupted by the sounds and presence of living creatures. Finding weaknesses in a human body was far more difficult than finding them in inanimate objects.
But Mousse's Observation Haki was now aided by the Book-Book Fruit, which could amplify weaker information and diminish excessively strong interference. This largely avoided that problem.
Considering that Armament Haki, which was an important—and often primary—means of defense, could likewise be