She Jian and his family had been captured by humans while hunting and fishing. Only She Jian managed to dive back into the sea when they tried to gut him on the boat.
Fortunately, there was a crevice in a rock nearby, where he hid and nursed his injuries, thereby saving his life.
Otherwise, with such severe injuries, the blood in the water would not only have drawn large predators.
Some small fish, as thin as hair, loved burrowing into such wounds and feasting on the flesh.
Hua Ji had also had a brush with death in his youth, coincidentally saved by a powerful human.
This made Hua Ji not particularly malevolent towards humans.
However, Hua Ji still obeyed the Lord of the Sea's orders.
Other than secretly helping Lu City suppress several disastrous tsunamis, she had not formed any bonds with human powers.
She Jian had ample reasons to hate humans, so he was the most likely one to leak information about the young mistress of the Han Yang Empire.