Miyumi

Miyumi is the main heroine of Scooby-Doo and the Samurai Sword. She is portrayed/voiced by Kelly Hu, who also voiced Karai in Teenage Mutant Ninja Turtles series, D'Vorah in Mortal Kombat X, Stacy Hirano (Japanese: 平野ステイシー Hepburn: Hirano Suteishī) in Phineas and Ferb (2007-2015).

Appearance
Miyumi is a Japanese teenage girl, with dark hair held in long pigtails. Her main outfit looks like a school uniform, consisting of a maroon blazer with a white shirt, a purple tie, an orange and yellow badge, violet leather boots and skirt.

Personality
Miyumi was at first loyal towards her master and oblivious to her true colors. The reason Miyumi sided with her master was because she was tricked and deceived into thinking that she would be closer to her Scottish American friend named Daphne Blake (Grey DeLisle) if she worked with Miss Mirimoto (also voiced by Kelly Hu). When Daphne convinced Miyumi that she was being used, she saw the error of her ways and sided with Mystery Inc.

Scooby-Doo and the Samurai Sword
Miyumi is a Japanese friend of Daphne Blake. She comes from Japan and serves in a karate school with Daphne. Miyumi meets Scooby-Doo (Frank Welker) and the Mystery Inc. gang when they come to Osaka and aids them on their journey. She serves under Miss Mirimoto, the conniving head of the karate school, but later in the film refuses to sell out her friends. In the finale, Miyumi disobeys Miss Mirimoto and helps Scooby-Doo and his friends by stealing the Black Samurai's sword. She honors Scooby-Doo after he defeats the Black Samurai and becomes a legend.

Trivia

 * Before Kelly Hu was cast, Lauren Tom, Sandra Oh, Janice Kawaye, and Lucy Liu were considered to voiced Miyumi.