|“||Try to remember me kindly... if you will. Take care of Ponyo.||”|
Despite being viewed as the antagonist, he expresses his intentions are only in his daughter's best interest, so he isn't really a villain. He lives with his family in the underwater harbor.
Fujimoto is presumably slender 40 years old, but he may have lived much longer. He claims he was once human, which implies he underwent some changes. This may be a clue as to why he has strange, bird-like markings on his cheekbones and under his eyes.
He has long red hair like Granmamare and his daughters, with light green eyes. He wears a very strange cerulean and white-striped suit with a wide magenta tie.
When upon land, he uses a contraption he explains is a humidifier, to wet the ground with sea water as he is walking along it. This may imply he cannot go on land comfortably without it. Also, when seen by humans, he is described as appearing very strange and perhaps shady, or to be avoided. This is only assumed, as he means no harm to humans although he seems to dislike them.
Fujimoto acts like a villain, because he is strict to his daughter Ponyo. So she never talks good about him. For Lisa he is kind of a creep, who mistakes him for spraying pesticide, which is actually water so he can survive on land.
You know, in his core he is a good guy, who cares about his daughters. He is just over-pessimistic. He hates being a human, because the humans pollute the environment. So he uses magic to purify the sea. For that purpose he creates the Elixir. Because of humanity's destructive behavior, he becomes an over-pessimistic nerd. His wife Granmamare adds more optimism to his mind.
Since he is a human, he can't breathe underwater. So he needed to build a underwater harbor and a submarine.
He learned to use magic to live longer and to purify the sea. He works on his elixirs since 1907. His daughter Ponyo has more magic power than him.
He can summon Sea Monsters. He uses the monsters mostly to scout.
- Ponyo, his eldest daughter. He appears to have a somewhat difficult relationship with her, being a bit strict after she disobeys him - causing her to run away.
- Ponyo's Sisters, his younger daughters. Unlike Ponyo, they are passive, and listen to their father, staying in their ship and bubble. But they become rebellious, too.
- Granmamare, the Goddess of Mercy, and his wife. He appears to be intimidated by her power and status, always fussing and worrying about how he cares for his children in her absence.
His daughters have more magic power than him. In addition they are rebellious. So he has a hard time dealing with them. His wife leaves him alone, because she travels on the sea around the world. Her duty as a goddess is to protect the sea.
He first met his wife on the submarine Nautilus. He was the only Asian on it. It was love on the first sight.