There is one side of Ken Sato that many people don't know about, aside from being a world baseball star, and being Ultraman; that is being a father.

Ken smiles happily when he sees his daughter (or rather the baby monster kaiju he rescued, who managed to turn into a human baby girl by trying to imitate Ken Sato), he pats the baby girl while humming, "My baby my baby... You are my baby." His eyes were very affectionate towards the baby Kaiju.

He wanted to be a father, long ago, before becoming an Ultraman, before becoming a world-class baseball player. His father made him want to be a father, but then his father also made him lose that dream. And the presence of the baby made him want to make his dream come true again, even though he knew it wouldn't last long.