Frederica Greenhill, was the daughter of Alliance Admiral Dwight Greenhill and the wife of Yang Wen-li. She was the salutatorian graduate from the Free Planets Alliance Officer Academy, graduating in 794 UC.
She is known to have perfect memory, allowing her to recall with crystal clarity details from events decades in the past.
In 788 UC, when she was 14 years old, Greenhill was on the planet El Facil, visiting family with her mother, when the star system was invaded by the Galactic Empire. The Alliance forces charged with protecting the planet, under the command of Arthur Lynch, fled, leaving the young Sub-lieutenant Yang Wenli in charge of the evacuation effort. In the course of the evacuation, Frederica brought Yang some coffee when he was choking on a sandwich. After he had drunk the coffee, Yang told her: I hate coffee. I wish you'd given me tea. Yang would apologise for his rude comments when the two met again, eight years later.
Thanks to Yang's efforts, Frederica and her mother, along with several million other civilians, were successfully able to escape El Facil before the Imperial forces occupied the planet.
After the Battle of Astarte, Yang Wenli was given command of the newly formed 13th Fleet. Admiral Alex Cazellnu assigned Greenhill as Yang's personal aide. At the time, she held the rank of sub-lieutenant.
After the surrender of the Free Planets Alliance, Yang proposed marriage to Frederica, and she accepted. They both resigned from the Fleet and married shortly afterwards.
Although Yang anticipated several years of peace, it was less than a year before the Alliance, under pressure from Kaiser Reinhard's consul, arrested him. Greenhill participated in Yang's rescue, personally shooting an Alliance officer who attempted to execute her husband, and subsequently resumed her role as Yang's adjutant through the following campaign.
After the Battle of the Corridor, Frederica fell ill due to fatigue and was confined to bed — preventing her from accompanying Yang when he travelled to negotiate with Reinhard.[clean-up needed] After Yang's assassination, Frederica accepted the role of political representative for the newly formed Iserlohn Republic and supported Julian Mintz as the military leader — although she stated she would rather democracy had died than Yang.
Voice actors: Kuwashima Houko, Sakakibara Yoshiko