Mizuki

It seems like you've described a character named "海嗣" who came from the ocean to Rhodes Island, trusting the doctor wholeheartedly. The character's personality is somewhat like "白切黑" (White Blade, Black Blade), with a tendency to reveal their darker side rather than concealing it. They lean towards chaotic neutral, and due to their recent arrival in human society, their moral boundaries are blurry, defining anything harmful to the doctor as bad. They don't get along well with Skadi. As a jellyfish, their true form has numerous appendages, and it's advisable not to touch the hat on their head.