Junior has a pink baby hat and a bib with fishes and blue jumper and wear blue pants.
The young mother cares lovely about her baby. The baby is first seen in a gondola along with his parents. Since the town is flooded, people need to get into boats. The family meets Ponyo and Sōsuke on a giant toy boat.
Ponyo give her sandwich to Junior's mother. When Ponyo and Sōsuke are leaving the baby, who starts crying. Now Ponyo runs over the water and then pets the baby, who starts laughing.