Koreena (voiced by Katie Griffin) is a female feline alien with blue hair, white fur with blue tiger stripes and red eyes. She was a former student of Spindly Tam Kanushu at the same time that Betty was in training. However, Koreena was a snob who was lazy, idled her time away playing video games instead of focusing on her training, and cheated on all her tests by copying off Betty during a test. She does not have a very good relationship with her peers nor does she with Spindly Tam Kanushu. She can be best described as the "cool kid" of the martial arts school. She refuses to acknowledge her behavior, insisting that she was Spindly Tam's favorite student until Betty stole her position as a Galactic Guardian by charming her way into being Spindly Tam's favorite. She is, nevertheless, an expert in robotics. In the end, she got in trouble with Spindly Tam Kanushu for kidnapping him and for her snobbery and dishonesty.
People misspell her name as they pronounce it "Kareena".