The Erebonian Empire

Lore & Background

The Erebonian Empire is a nation that has built its identity around military strength, imperial unity, and the harnessing of Traces—crystalline structures that, when embedded in a living person, grant extraordinary physical and arcane abilities. Traces are not merely weapons or curiosities; they are the currency of power in Erebonian politics. Whoever controls a Traces, or the knowledge to create and wield them, holds leverage over the Kaiser's court, the provincial governors, and the armed forces. This makes the empire's internal politics a constant, low-grade war of maneuver, where a whispered alliance can be as decisive as a cavalry charge.

The Ouroboros Military Academy sits at the crossroads of this tension. It is the institution through which the empire recruits and trains its officer corps, and its student body is a microcosm of the nation's social strata: children of nobles, sons of frontier soldiers, and the occasional outsider who has earned a place through sheer will. The academy's curriculum blends combat doctrine, Promote theory, and imperial law, producing graduates who are expected to be as politically literate as they are lethal. For the student body, the academy is both a crucible and a stage, where friendships forged in drills and late-night dormitory conversations become the bonds that will later hold the empire together—or tear it apart.

Beyond the academy walls, the empire's provinces are a patchwork of loyalists and restless factions. Mercenary companies, regional militias, and secret societies all operate in the gaps left by imperial bureaucracy. The Aurelia, a special military unit, and groups like the Black Tortoise represent the spectrum of organized force that exists outside the regular army. Together, they paint a picture of an empire that is powerful but not monolithic—strong enough to project force across its borders, yet porous enough that a single determined teacher and his handful of students can set the whole structure trembling.

In Their Own Story

The rain came down in sheets over the training grounds, turning the packed earth into a grey mirror. Rean stood at the edge of the parade field, arms crossed, watching his students run their final drill before the inspection. The sound of boots striking mud was a steady, almost musical rhythm, and for a moment the empire felt very small—just a group of young people trying not to drop their swords in the downpour. Then the horn sounded from the citadel above, three long blasts, and every head turned upward. The Kaiser's personal guard was moving through the lower gates. Something was wrong. Rean felt it in the way the rain seemed to hold its breath, in the way his students' eyes widened and their hands drifted toward their Promote crystals without a word. He did not call out. He simply turned, walked back toward the academy's iron doors, and began to open them one by one. The empire was about to remember what it meant to be tested.

Reader's Guide

The Erebonian Empire enters the Trails timeline at the start of Trails of Cold Steel I, where the political assassination of a key imperial figure sends shockwaves through the Ouroboros and the broader military establishment. Rean Schwarzer, a young instructor at the academy, finds himself drawn into a conspiracy that reaches the highest levels of the Kaiser's court. The plot of Cold Steel I introduces the Traces as a destabilizing force and establishes the Aurelia and the Black Tortoise as rival power-brokers.

Cold Steel II deepens the political landscape, revealing how the empire's provinces and military units have their own agendas, and how the Traces are entangled with the fate of the nation itself. The two games together form a complete arc: a personal story of a teacher protecting his students that escalates into a crisis of imperial succession and the very nature of Erebonian sovereignty.

Trails of Cold Steel III and IV shift the focus to different regions and student groups within the same empire, broadening the picture and showing how the events of the first two games ripple outward into the provinces, the civilian population, and the long-term military doctrine. Together, the four entries make the Erebonian Empire one of the most fully realized settings in the franchise, connecting to the broader Trails world through shared characters, the Promote system, and the ongoing mystery of the world's history.

Did You Know?

• The Ouroboros Military Academy is not just a school—it functions as a political institution where the empire's future officer corps is shaped, making every student a potential actor in the nation's power struggles.
• The Erebonian Empire's setting spans four separate games (Cold Steel I through IV), each following a different group of students, making it one of the longest-running single-nation arcs in the Trails series.
• Traces, the crystalline power sources central to the empire's military and political life, exist within the broader Trails world's Promote system, linking the Erebonian story to the wider universe's mysteries.
• Rean Schwarzer's role as a teacher rather than a soldier or noble is a deliberate narrative choice, positioning an ordinary individual at the center of an empire's extraordinary crisis.