Kodachi attends a rival high school of all the other teenagers (at least, those who go to Furinkan High School). She seems to be constantly wearing her purple leotard and carrying her ribbon for martial rhythmic gymnastics. She also specializes in fighting fair--well, fighting in a way that's fair to herself. Most often, in martial arts/gymnastics competitions, her opponents don't ever show up, owing to a few exploits a little before the competition. She loves plants, and commonly calls herself the Black Rose (one of her pre-comp specialties is a bouquet of black roses that puff out paralyzation gas). She has fallen in love with Ranma-kun, and is always arguing with her brother about Ranma. She, like her brother, is so clueless as to not realize that -kun and -chan are the same person, and hates Ranma-chan. Oh, yeah, she's also flipping INSANE, with an evil laugh to back that up. She is the younger of the Kunou siblings. I kinda feel sorry for her--always had empathy for humorously crazy people %).
