Why is Ponyo so much bigger than her sisters?

PONYO 2, COMING TO THEATERS IN 2019.

PONYO 2, COMING TO THEATERS IN 2019.

Biography. Originally a human, Fujimoto serves as the Guardian of Sea Life. Being the husband of Granmamare, Fujimoto is the father of Ponyo and her sisters. He's shocked to find out that Ponyo is in the care of a young boy named Sosuke, and he has to retrieve Ponyo back before it's too late.

Speaking with Nippon.com, Suzuki talked about Miyazaki's last feature film The Wind Rises and how it could've been another movie entirely. “He [Miyazaki] wanted to do Ponyo 2, but I didn't want to watch that,” Suzuki told Nippon.com. “It was no more than that.”Jul 21, 2016

Later after Ponyo finishes with her food she begins to dose off do too using a lot of magic throughout the course off the day, which is also her energy. And once you run out of energy you get weak and Ponyo's way of getting weaker is by falling asleep which too afterwards Lisa puts her in bed.

Miyazaki's magical friendship: A little boy and a goldfish. Ponyo triggers unforeseen consequences when she turns from a fish into a little girl in “Ponyo.”Aug 12, 2009

Sōsuke (さすけ, Sosuke) is one of the main protagonists of the film Ponyo on the Cliff by the Sea directed by Hayao Miyazaki. He is the son of Koichi and Lisa, as well as Ponyo's lover.

Ponyo is Fujimoto's oldest daughter. Like the rest of her siblings, Ponyo does not seem to respect her father, nor care about his wishes, which is why she chose to run away from home.

The film focuses on the love between a young boy named Sōsuke and Ponyo, a goldfish who becomes a girl, against the backdrop of a magical tsunami caused by Ponyo herself that strikes Sōsuke's idyllic coastal hometown.