Donner is the sister of Em, the best friend, girlfriend and later wife of Robbie, the daughter-in-law of Rudolph The Red-Nosed Reindeer, Support Crew to Santa Claus's sleigh team and the deuteragonist of the Robbie the Reindeer films. She is based on the Donner from Christmas folklore. Unlike the Donner from the 1964 Rudolph film who was Rudolph's father, this Donner is female, a lot younger and is instead Robbie's love interest. Also unlike previous incarnations, Donner doesn't pull the sleigh instead she serves as support crew as there's a reindeer to do physio, a reindeer to Cook, a reindeer to wash up and all of those reindeer are her.