Miyumi is the Japanese friend of Daphne Blake and associate of Mystery Inc. Initially, she was blinded by her loyalty to Miss Mirimoto, but when she finally saw her master's true intentions, she turned against Miss Mirimoto and sided with Daphne and the gang and was voiced by Kelly Hu.
Physical appearance: Miyumi is a female, 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 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 into thinking that she would be closer to Daphne if she worked with Miromoto. When Daphne convinced Miyumi that she was being used, she saw the error of her ways and sided with Mystery Inc.
History: Scooby-Doo! and the Samurai Sword, Miyumi didn't know the whole plan, but she was instructed to get close to Daphne. Once she knew the intention was to revive the Black Samurai, she turned on her teacher and helped the gang. In the end, they offered her a place on the team, but she turned them down in order to find what she did best.
Appearances: DTV13. Scooby-Doo! and the Samurai Sword