Wilma is the tritagonist in The Flight Before Christmas and its sequel Little Brother Big Trouble: A Christmas Adventure. She is a friend of Niko's. She was voiced by Vuokko Hovatta in the Finnish version and Emma Roberts in the English redub.
Wilma is a streetwise weasel, whom Niko and Julius got to know while saving Santa from Black Wolf's attack. Wilma befriended them and joined the family at Home Valley. Wilma left home as her family didn't support her wish to be a singer. Wilma is fearless and sometimes a bit of a spirited young lady who used to work as a singer at Santa's Fell, entertaining the Flying Forces. Aside from being able to move very fast, she also has an outspoken honest nature and says out loud what most everybody would prefer not to talk about.