Hans and Fritz Katzenjammer
These two juvenile antiheroes were the original troublesome twosome. Katzenjammer in German literally means "the howling of cats," and it is also German slang for a hangover. A hangover would be a pleasure compared to the dire antics of Hans and Fritz, who play tricks on neighbors, pets, tradesmen, and any other available target, including their own mother. The Katzies, as they are often called, are born troublemakers. Their neat clothes and innocent faces conceal their deep-seated ability to do mischief.

Mama
Apparently a widow, this happy housewife tries, vainly sometimes, to turn a blind eye to her mischievous offspring.

Der Captain and Der Inspector
Der Captain is actually a boarder in the Katzies' home, and the perpetual butt of their pranks. Der Inspector is the local truant officer, but he seldom catches the inventive kids. All too often the grownups' plans to turn the tables on the devilish kids come back to haunt them.