Zenjuro Ohfujiwara

 is Naeka and Kosuke's rich grandfather in the Kamen no Maid Guy series.

Naeka and Kōsuke's wealthy and doting grandfather. Concerned that both his family line is in danger, and his surviving grandchildren might disgrace them, Zenjurō hires the two maids to ensure their safety and the Fujiwara fortune.

Being one of the highest financial persons in the world, Zenjuro is never afraid to commision his wealth, even as much as to rent an expensive lounge just to watch his granddaughter's kendo match and close school for a day, showing the kind of vast influence their family has. He also genuinely loves his grandchildren and his overprotectiveness extends to forcefully deport an ambassador and his son or arrested for spying and did not care if it became an international incident all because the ambassador's son groped Naeka's butt.