Because of differences in training efficiency, the strong figures of the sea had each developed their own training methods.
For example, Kaido's beloved suicide stunts, Garp once flattening eight great mountains, and Luffy's self-developed Rubber Gear Shift.
Among these methods, using Sea Stone to suppress one's abilities while training the body was a method many Top Experts who had eaten Devil Fruits had used.
At the beginning, they would use Sea Stone handcuffs of lower purity. As their strength improved, the purity of the Sea Stone handcuffs would also increase. With Sea Stone's effect of draining stamina, the tempering of one's physique produced immediate results.
Seeing that Doflamingo had finished training, Hancock hurriedly fetched a towel from the side and carefully wiped the sweat from his upper body.
"Is there something you need? You even came all this way to find me." Doflamingo asked. Because of the Sea Stone's suppression earlier, he had not spread out his Observation Haki at all and knew nothing of what had happened on deck.
But now that he had removed the Sea Stone, he immediately regained his ability to sense emotions with Observation Haki and detected some fluctuations in Hancock's state of mind.
"It's Yamato and the others. They've been clamoring to see the ship fly." Hancock pouted. "They're really a bunch of children who never grew up."
Doflamingo wore a faintly amused smile. "You make it sound like you're so much older, Hancock. Aren't you only fifteen yourself?"
"Don't you want to see a flying ship too?"
Hancock's face immediately reddened, and she fidgeted shyly. "Fine~... Actually, I want to see a flying ship too."
No one could hide their emotions in front of Doflamingo. Though Hancock looked mature and composed, she was actually somewhat curious about this kind of vessel as well.