Answer: marcie

AnswerCrossword Clue
MARCIEPeppermint Patty's pal
MARCIEFriend of Peppermint Patty
MARCIEGirl who calls Peppermint Patty "sir"
MARCIEPeppermint Patty's best friend
MARCIE"Peanuts" character who calls Charlie Brown "Charles"
MARCIE"Peanuts" girl
MARCIE'Peanuts' girl with glasses