Mamiya Kojirou

What he calls the protagonist: Ryouta

The quintuplets' father. He loves spoiling his daughters, though they see their father as kind of annoying. He loves his wife wholeheartedly and rarely gets into any fights with her.

Kojirou is a master at cooking and works as the head chef of Seamore, while teaching Tamane everything he knows about cooking. At times, he goes on journeys to do some research about all kinds of cooking styles and so on. It's become such a normal thing in the family that nobody is surprised even when Kojirou disappears somewhere, only to come back from a journey...