Aurelia was born in Erebonia as the daughter of Count Le Guin.
Although born a noble, Aurelia grew up as a passionate and dignified fighter. She enrolled at Thors Military Academy and immediately seized control of the Fencing Club, declaring war on the other clubs. Wallace Bardias, president of the Riding Club at the time, challenged her on horseback. The dual ended in a draw. The two have remained close professionally ever since.
Her father, serving as the commander of the Lamarre Provincial Army, led the chivalry into the the Hundred Days War but was wounded in battle. After the war, the academy gave her special permission to graduate in a single year to succeed her father. After graduation, she joined the provincial army as its new commanding officer.
Rising through the ranks
Aurelia is the only known practitioner of both the Vander school and Arseid school of swordsmanship. She joined the Arseid school in approximately S.1195, around the age of 25, and mastered the school a year later. Determined to become the strongest warrior in Erebonia, she aims to surpass her previous masters, Zechs Vander and Victor S. Arseid, respectively.
Aurelia is introduced in Trails of Cold Steel II, where she is in charge of maintaining the Noble Alliance's control in the western half of Erebonia during the civil war. She first shows up in Legram to meet with Laura S. Arseid in her father's stead. On the final day of the war, she is tasked with stopping the onmarch of the Imperial Army. Although piloting her Spiegel, it gave her a first shot of facing off against one of her former masters: Zechs Vander and his 3rd Armored Division.
- Main article: Northern War
Despite her efforts, the Noble Alliance loses to the reformist faction and pledged full collaboration with Chancellor Giliath Osborne. Aurelia complies with the ceasefire. Together with co-commander Wallace Bardias and 50,000 of their soldiers, they are confined to the Juno Naval Fortress during negotiations with the imperial government. The meritorious service of infiltrating and occupying North Ambria would be a substantial compromise in the ongoing negotiations of the uncertain future of the Provincial Armies. It is agreed upon with the imperial government that the Noble Alliance abdicates the naval fortress. Aurelia and Wallace spend the next two months preparing an invasion of North Ambria, together with the Intelligence Division and Railway Military Police.
After a fairly effortless invasion considered a textbook example, Emperor Eugent Reise Arnor III offers Aurelia a position as the principal of newly-established Thors Branch Campus. Aurelia accepts the position, leaving her sworn ally Wallace in control of North Ambria.
Exploring her limits
Despite assuming office as principal, Aurelia refuses to compromise her ambitions to become the strongest of the empire. In June S.1206, she joins her students in taking back the Juno Naval Fortress from the occupation of the Northern Jaegers' remnants and Ouroboros. The invasion concludes with a battle between Aurelia and Arianrhod. Arianrhod praises Aurelia that she has surpassed what she once was and that she definitely ranks among the strongest of those still human. A couple of weeks later, she challenges her former master Victor to a dual. Once again, she is victorious.
During the outbreak of the Great Twilight, she boards her Spiegel and acts independently from the rest of Thors Branch Campus. She serves Mildine Juzalith de Cayenne and her Weissland Army, meaning teaming up with her former partner Wallace Bardias and Vita Clotilde. She rescues Ash Carbide from his confinement and takes back the confiscated Pantagruel.
|—||—||Chapter 3 gear|
STR+605 RNG+2 Critical+15%
STR+605 RNG+2 必殺率+15%
|—||—||Final Curtain: " Flower Petals at Blaze's End"|
|[STR+1500 RNG+2 必殺6%]|
|攻撃(威力A ブレイクD 崩し+30%)
|Cardinal Radiant Sword|
|魔法攻撃(威力S+ ブレイクSS 崩し無効)
円LL(地点指定)：石化30% 凍結30% 炎傷30% 睡眠30%
|Rebellious Sword Dance|
|攻撃(威力4S ブレイクD 崩し無効)：全体：2ターン全能力低下↓(大)|
|攻撃(威力B+ ブレイクD 崩し+30%)：|
|魔法攻撃(威力A+ ブレイクSS 崩し有効)：|
|攻撃(威力5S ブレイクD 崩し無効)：|
|5||Critical rate +50% (10 turns)|