Hailing from the Libot colony Side 6, Chris was good friends with her neighbor Alfred "Al" Izuhara and was seen by him as a "big sister".
Upon graduating from the Academy, Christina was selected to be the test pilot of the new prototype Alex Gundam due to the piloting skill she displayed, despite being a rookie.
Chris later ran into Bernard Wiseman when she caught him sneaking around Al's house and, thinking he was a burglar, knocked him out. However, after Bernie woke up and Al told Christina Bernie was a friend of his, she and Bernie became fast friends. The two began to develop a crush on each either, though neither was aware of the other's affiliation with the opposing sides of One Year War, Chris not knowing that Bernie was a member of the Cyclops Team sent by Zeon to destroy the Alex Gundam, while Bernie was unaware Christina was the pilot of said Gundam.
After Operation Rubicon, the Cyclops Team's attempt to either acquire or destroy the Alex Gundam, failed, Colonel Killing went ahead with his own plan to destroy the Alex Gundam: a complete nuclear bombardment of Side 6 to eliminate all the Federation Forces occupying it. In a desperate attempt to prevent the destruction of Side 6, Bernie went out in his Zaku to try and destroy the Alex Gundam, hoping that doing so would stop Killing from launching the nukes. Chris, in the Alex Gundam, engaged Bernie's Zaku while the Earth Federation Forces thwarted Killing's bombardment. Though Bernie initially had the upper hand thanks to Chris' inexperience, in the end the superior technology of the Alex Gundam wins out and Chris destroys the Zaku by ramming her beam saber straight through the cockpit and into its reactor, killing Bernie and vaporizing his body. Al attempts to break up the fight, but arrives just as Chris destroys the Zaku and Bernie's body is scorched.
Later, as Chris is leaving Libot, she asks Al to say goodbye to Bernie for her. Al, not wanting her to know the truth, agrees and chooses not to tell her of Bernie's fate and her role in it.
Anti-Earth Union Group