Nadesico Volban is a student who goes to the school that Meg and Jo attend undercover. She has an air of beauty and nobility and nobody can oppose her because of it.
Background
Meg met her one night on the top of the dorm when Meg tried to help another student, Yoko. She seems to be against Angelique within the school. RAPT had turned her into a mutant for their experiments at the school. RAPT had been monitoring the school beforehand to see how their experiments went. She becomes a monster that attacks Meg and then Jo. Jo confronts the monster several times and eventually defeats it. Jo killed her in combat, but the death triggered something in Jo’s mind.
Nadesico mutant
Nadesico in human form