|Family:|| Karsten (father)|
Nurse Joy (mother)
Paige (younger sister)
other Nurse Joys (aunts?)
|Voice actor:|| Sonny Dey (English)|
Mamiko Noto (Japanese)
Marnie is daughter of Nurse Joy and an older sister of Paige. She is much more wiser and would take risk to protect her sister, as she cares about her.
- She is one of the few characters related to the other Nurse Joys to have their name revealed.