Christina Mackenzie is one of the main characters from Mobile Suit Gundam 0080: War in the Pocket and is also the deuteragonist of the manga prequel
She is a mild-mannered beauty whose appearance and personality are exactly what you would expect from the "girl next door". She is strong-minded and has a strong sense of responsibility, she's also very kind-hearted and caring towards those close to her. While she has a harmonious relationship with her family, she felt that her upbringing hinted that her parents were leaning more towards having a son and was raised to at least be able to stand up to the boys in her group. This consequently led to her having a more tomboyish personality and would eventually start her attraction to the military.
In a tragic twist of fate, Bernie is actually a Zeon soldier and a junior member of the Cyclops Team sent to the colony to destroy the Gundam Alex. The team, including Bernie, would sneak into the facility, but its security would catch them in the act when Bernie flubs his answers leading to fight inside the base.