Melanie Bellanchof (voiced by Debi Derryberry) is a newer student to the school. She is Mrs. Bellanchof's daughter, her parents are either divorced or split up, as Melanie comes to town to live with her mother. She doesn't like living with her, and when referring to anything that she doesn't like will say either "Don't know", "Don't care" or "Smells". At her house, she is mostly seen on the phone talking to a friend from her old school named Gloria.

She is one year older than the rest of the kids from 402 and she does anything to annoy her mother.