Rosamia Badam

An artificially enhanced Cyber-Newtype produced by the Earth Federation's Augusta Newtype Labs. Traumatized by the sight of a falling space colony during the One Year War, Rosamia alternates between sadistic aggression and childlike terror, and her psychological instability is only worsened as her masters subject her to repeated reprogramming. Later in the story, she is dispatched to infiltrate the Argama crew, an undercover assignment which puts her on the path to complete mental disintegration.

Source
Mobile Suit Zeta Gundam Viewers Guide - by Mark Simmons