Zaelum
It would be interesting if Aqua had acquired a fruit related to water to further enhance her power, or perhaps one related to souls or healing, While king al his body gradually adapt to the world of one piece, Be affected a little by the laws of the world and confused as one of the people in 1 million who are born with the emperor's haki, Making king apart from his terrifying aura and king motor, also have the king's haki, Making him release all 3 at the same time when he gets scared, making his enemies feel the pressure of 3 different things.