Melinda Susan Metalman Lang (better known as "Mindy Metalman" or "Melinda-Sue") is a central character in The Broom of the System.

Mindy grew up with her lawn-obsessed father in Scarsdale, New York, where her next-door neighbor was Rick Vigorous.

Later she attended Mount Holyoke College, where she was roommates with Clarice Beadsman and where she met her future husband, Andrew Lang.