Yuki is a Japanese girl who does origami. When Dora traveled to Tokyo, she met Yuki at a nearby building. They became friends and Yuki taught Dora the art of origami. She taught her how to make boats, planes, swans, and other creatures. Dora tells Benny and Boots that in "Benny's Treasure".

Yuki appears in the episode "Benny's Treasure," even in the flashback part.

She also appears in Pepe the Pig's School Adventure as one of Dora's classmates and in School Science Fair as Boots' teammate for the science fair.