Sara Murphy is quite protective of her little brother, Milo. She is sometimes worried that Milo could ruin her important moments, but she still likes to spend time with him. Sometimes her concerns about Murphy's Law overwhelm her so that she makes errors, ruining the moment for herself. ("The Doctor Zone Files"). She uses her cellphone a lot. ("The Wilder West").
She is a huge Doctor Zone fan. Her shirt and pajama shirt both have a Time Ape image on them. ("The Doctor Zone Files") She once spent an entire day on the Nowhere Desert Dude Ranch taking pictures and collecting dirt samples because she believed it to be the filming location of an episode of Dr. Zone. She also has an interest in comic books. ("Love Toboggan")
Sara is a fair-skinned, slender girl aged seventeen years. She has chin-length blonde hair and blue eyes.
She wears violet capris, a white T-shirt with light blue sleeves and a picture of Time Ape on the front, and red sneakers with white soles. She wears green four-leaf clover hair clips.
- Like Milo, she carries a backpack loaded with stuff for any misfortune, even though it seems she is not jinxed by Murphy's Law like her brother.
- According to tradition, Four-leaf clovers bring good luck. It is reasonable to believe that Sara wears clovers in her hair to counteract the bad luck that usually happens around her family.
- Sara is one of the only seven characters whose eyes are shown with pupils.
- She sometimes watches Orton Mahlson from behind a tree on his property.
- Sara's dad introduced her to Doctor Zone when she was in fourth grade.
- She once asked her mom if she could change her name to "Time Ape", but her mother refused ("Love Toboggan").