Augusta Frederica Adel-Adler (アウグスタ・フレデリカ・アデルアドラー, Augusuta Furederika Aderuadorа̄?), currently under the name Frederica Rosenfort (ローゼンフォルト, Rо̄zenforuto?), is the tritagonist of the 86 -Eighty Six- series introduced in Run Through the Battlefront.
Frederica has the bloodred eyes of a Pyrope and the jet-black hair of an Onyx. Due to her occupation as a Mascot, her outfit consists of a child-sized version of the Federacy's military uniform, substituting the steel-colored jacket for a beige one. She occasionally wears a beige flight cap emblazoned with the Giadian emblem.
Frederica is haughty and outspoken, as she had been raised to be the next in line for the Giadian throne. She articulates her speech maturely for someone her age, which often rubs others the wrong way. She is not afraid to argue her point and occasionally breaks protocol to get her way, such as when she snuck aboard Shinei's transport during a sortie. When she was younger, she participated in boyish activities such as tree climbing, much to her knight's chagrin.
Frederica was born in the year RY 358 / SY 2139. At one point of time, Kiriya Nouzen was assigned to be her personal knight and caretaker. In the same year, the Giadian Empire launched an all-out war against all of its neighboring countries. Six years later, the empire was overthrown and almost all member of the imperial royal family perished, leaving Frederica the last living member. She was later adopted by Ernst Zimmerman who faked her death to the public.
Due to her Pyrope heritage, Frederica can see the past and present of a person known to her, a useful ability to have when extracting personal information or searching for MIA combatants. Though her powers have the disadvantage of only showing images without sound so the information can be rather limited.