Build a movie plot around this: Who are Ssuke and Ponyo looking for? Lisa.
Brunhilde is a fish-girl who lives with her father Fujimoto, a once-human wizard/scientist who now lives underwater, along with her numerous smaller sisters. One day, while she and her siblings are on an outing with their father in his four-flippered submarine, Brunhilde sneaks off and floats away on the back of a jellyfish. After an encounter with a fishing trawler (the net of which is scraping the trash-strewn bottom of the harbor), she ends up stuck in a glass jar. She drifts to the shore of a small fishing town and is found and rescued by a small boy named Sosuke. Shattering the jar open with a nearby rock, Sosuke cuts his finger in the process. Brunhilde licks his wound when he picks her up and the wound heals almost instantly, much to his surprise. After taking a great liking to her, and thinking her merely a goldfish, Sosuke renames her Ponyo and promises to protect her forever. Meanwhile, a distraught Fujimoto searches frantically for his taken daughter. Because of his own bad memories of the human world, he believes that Sosuke has kidnapped her and that she is in great danger, he calls his wave spirits to recover her. After the wave spirits retrieve Ponyo from Sosuke, the boy is heartbroken. He goes home with his mother, Lisa, who tries to cheer him up.Back underwater, Ponyo and Fujimoto have an argument, during which Ponyo refuses to let her father call her by her birth-name, "Brunhilde". She declares her name to be Ponyo and voices her desire to become human, because she has started to fall in love with Sosuke. Suddenly, using her magic, she forces herself to grow leg and arm-like appendages and start changing into a human, a power granted to her by the human blood she ingested when she licked Sosuke's finger. Her alarmed father forces her to change back into her true form with some difficulty and goes to summon Ponyo's mother, Granmamare. Meanwhile, Ponyo, with the help of her sisters, breaks away from her father and in the chaos inadvertently uses her magic to make herself fully human....