Oliver's father

Francine's grandfather is the father of Oliver Frensky. He appears in "Background Blues" helping Francine learn about the Frenskys. He once owned a restaurant called Hamburger Castle. He is seen again in "Francine's Pilfered Paper."

He also appears in Arthur's Perfect Christmas with the rest of the Frensky family. In this appearance, he is recolored to have brown hair.

In "The Great MacGrady", Francine says that her grandfather died of cancer, so it must mean that he is deceased.