Birthdate: 468 R.C. (777 U.C.)

Hildegard von Mariendorf is one of the principal characters in the series. She served as the New Galactic Fleet's Chief Advisor

Hildegard, usually referred to by the nickname Hilda, was born in Galactic year 777 into a distinguished noble family of the Goldenbaum dynasty, the sole daughter of the benevolent and just Count Franz von Mariendorf. From an early age, she was distinguished from the other girls of the aristocrat society by her independent ideas. Completely unconcerned, Hilda pursued her own interests in reading, politics and history. Her mother having died when Hilda was young, her open-minded father respected Hilda's unique ideas and choices in life.

In U.C. 797, the old galactic empire split into civil war, where the old nobility stood against the new emerging camp of military elites lead by Reinhard von Lohengramm. Hilda convinced her father to plea allegiance to the latter, whereupon she met Reinhard for the first time and impressed him with the clarity of her insight. When the Lohengramm camp emerged victorious from the civil war, Reinhard gained complete political and military power in the empire, and Hilda became Reinhard's chief secretary and assisted him in the progressive reforms that swept across the empire.

From U.C. 798 to U.C. 800, Hilda played an active role on the galactic stage, advising Reinhard wisely on imperial policies and tactics, and became one of his most valued and trusted staff. During Operation Ragnarök, where the empire battled the Alliance, Hilda served as a staff officer and became the first female to board the Flagship Brünhild.