Abigail Sleuth's grandmother

The grandmother is a relative of Abigail Sleuth.

Physical appearance
She looked like Daphne Blake with black hear.

Scooby-Doo! (DC Comics)
According to Abigail Sleuth she helped to find prime minister Churchill's wife's stolen brooch. ("Ah...Rival")

Appearances

 * Scooby-Doo! (DC Comics)
 * #142(a). "Ah...Rival" (picture)