Red Monroe is a friend of Ruby Redfort's that also attends Twinford Junior High. In the second book she hears the sea whisperer during the school swim-a-thon, which Ruby dismisses as Red's imagination, as Red is very suggestible, often prone to imagining things, and is extremely clumsy.

Red’s Mother Sadie is a costume designer for movies, Red’s father left when she was a baby. Red has one older brother who plays the guitar.