The character is first referred to in the strip from May 30, 1968, in which Charlie Brown decides to be brave, ring the doorbell of the Little Red-Haired Girl's house and introduce himself. He is surprised when her grandmother, who also has red hair, opens the door instead. In the following day's strip, an embarrassed and tongue-tied Charlie Brown can think of nothing else to say to the woman except for, "You're a cute grandmother!" Nothing more is said of the Little Red-Haired Girl's grandmother after that.