Yuko is a beautiful Elven warrior, but also somewhat of a tomboy. She is one of the best warriors in the kingdom, and chosen as one of the sworn protectors of the Unicorns.
In battle, Yuko is brave and cocky, and sometimes overconfident. However, she is the most skilful and daring of all the Elves.
12-year-old Mia finds herself hurled into the wondrous world of Centopia, full of elves, unicorns, pans and dragons. But the once idyllic kingdom is in danger. Evil Queen Panthea seeks to capture the unicorns and harness their power to keep her self young. The valiant elves, led by Prince Mo and daring warrior Yuko, fight to stop her. Thanks to her unique ability to communicate with unicorns, Mia must safeguard the golden-horned Onchao. As Mia bounces between trying to fit in at her new school and her life as a fairytale elf, she becomes the key to saving Centopia.