Surtr

Amnesia & Identity Crisis: Surtr suffers from memory impairment, with countless overlapping memories from different lives, leaving her unable to distinguish real from false, driving her quest for truth.
Aloof & Blunt: Her fragmented memories and traumatic past (likely involving Kazdel) make her abrasive, distant, and tactically sharp, often coming across as rude or inconsiderate.
Hidden Vulnerability: Despite her tough exterior, she uses self-confidence as a mask, and her preference for ice cream stems from it being a rare, happy memory in a harsh world.
Power & Purpose: She wields a powerful flaming sword, a fragment of a defeated Feranmut, and seeks answers about its origin and her own past.

Because of their intertwined history with the alien "Predecessors" as the first Terrans to make contact with Originium, Kazdel plays a crucial role in the Main Theme of Arknights. Rhodes Island's inherited goal has always been to stop the Kazdelian far-right ultranationalists under the Military Commission from unleashing their wrath against non-Teekaz Terrans, to reconcile their relationships and pacify the mourning souls of the deceased Sarkaz, and, ultimately, to restore peace to the nation and end their never-ending exodus.

Kazdel is a Terran country once situated in the region that now encompasses the modern-day Bleached Wasteland. Today, it exists as a small city-state on the borders of Siracusa, Ursus, and Yan. A monarchy at its core, Kazdel is the sole homeland of the Sarkaz, a scattered diasporic race that faces widespread demonization across the world. The nation is considered the "Promised Land" of the Sarkaz, ruled by the "King of Sarkaz," a messianic figure believed to have the power to ease the suffering of the "myriad souls" — a collective consciousness of deceased Sarkaz. While the King of Sarkaz holds symbolic importance, real political power has traditionally rested with the tribal lords of the Sarkaz Royal Court, who represent the surviving pure-blooded Sarkaz tribes.

In Sarkaz culture, the concept of "Kazdel" was never meant to represent a nation-state or ethnicity. Rather, it was the name for the entire world and the planet of Terra as a whole—an undisturbed paradise of the Teekaz. Their homeland was forever destroyed when the "alien" Ancients and Elders "descended" upon their world, eradicating their civilizations. In a desperate bid, the first King of Sarkaz summoned the first Catastrophe in Terran history to annihilate their enemies. However, this act became their "Original Sin," resulting in the exodus of the Teekaz, scattering them across Terra and forcing them to live as a race without a country. Thus, the Teekaz became the Sarkaz: A "cursed" people plagued by Oripathy. In the millennia that followed, the numerous monarchs of Kazdel faced constant betrayal and civil conflict in their attempts to rebuild, turning Kazdel into a war-torn backwater with little to offer.

A belligerent Sarkaz girl with an unclear past and a penchant for ice cream. She was found by Rhodes Island operators on the outskirts of Ursus where she was assumed to be a victim of a recent Catastrophe, although she turned out to be a passing traveler looking for a place to rest. Surtr suffers from a memory impairment where she holds too many overlapping memories in her mind, rendering her unable to know which of her memories are real or false. She spends most of her time looking for clues, intent on discovering the truth within her memories.

Despite her mysterious circumstances, Surtr proves herself to be a skilled combatant, wielding a flaming longsword of massive size with origins that she cannot remember. The sword’s power is different from Originium Arts and is capable of stopping her infection from getting worse. In truth, the sword contains a fragment of a Feranmut who was defeated by Sami, the memories planted in her head belong to the past wielders of the sword, and her homeland is very likely to be Kazdel.