Lumen

Biodata

Feature	Details
Name	Lumen
Alias(es)	Natalia
Species/Race	Ursus
Gender	Female
Affiliation	Rostov family; City Lord of Chernobyl
Occupation/Role	Rostov heir; Peterheim Middle School student council president; later City Lord
Status	Active
First Appearance	Chapter 18

Background / History

Lumen is the white-haired heir of the Rostov family and student council president of Peterheim Middle School. When she is hunted by assassins shortly after Orson arrives in Kazimierz City, she attempts to protect him by offering to go with her pursuers, despite being terrified herself. Orson intervenes and defeats the attackers, beginning their association. 18 19

Following the attack, Lumen recommends Orson to her family as security personnel. Her father hires him as a Senior Security Officer, and Orson becomes responsible for protecting her while accompanying her to school. 20 22

Though personally frightened by Duke Baikal's threats, Lumen refuses to abandon her student-council duties. She believes retreating from public life would damage the Rostov family's honor and political standing. 22

During the conflict with Baikal, Lumen escapes the Rostov villa with Faust and carries out a mission to reach the signal tower. She fights through pursuing forces with improvised explosives made from crossbow bolts and her siege spear, reaches the tower, and prepares to alert Saint Gallant Castle and Lungmen before being confronted by an Emperor's Guard. 39 40

After the Kazimierz City Incident, Talula passes the vacant position of City Lord of Chernobyl to Lumen. She accepts the responsibility and begins considering infrastructure, Northern Territory resettlement, Infected acceptance, and the competing interests of old and new nobles. 45 48

Appearance

Lumen is a young Ursus girl with an elegant noble presentation that contrasts with her increasingly candid behavior around Orson. 22 46

• Long, pure-white hair. 18
• Heterochromatic eyes: one red and one blue. 18
• Fair skin and a slender neck. 46
• Wears a Peterheim Middle School uniform while attending school. 22
• Uses a long siege spear and a steam spear launcher in combat. 40

Personality

Lumen is conscientious, courageous, and deeply shaped by her upbringing as a noble heir. Even while panicking during the assassination attempt, she tries to protect Orson, whom she believes to be an uninvolved bystander. 18

She initially treats status and family honor as obligations she must uphold at all costs. At school, she maintains a flawless public image despite her fear, taking comfort in knowing Orson is nearby. 22

After surviving Baikal's coup attempt, Lumen becomes more confident and less restrained by noble etiquette. She openly laughs, teases Orson, acknowledges the absurdity of her actions, and approaches her new duties without feeling alone. 33 46 48

Abilities & Skills

Siege Spear Combat

Lumen can use her siege spear offensively and adapt it to improvised battlefield tools.

• Tied explosive crossbow bolts together and fired them from her steam spear launcher to destroy roads and halt pursuers. 40
• Used a spear embedded in a marble statue, then sacrificed the launcher to pull the statue into the road as a barricade. 40
• Fought while injured during the signal-tower operation. 40

Leadership and Public Duty

As student council president, Rostov heir, and later City Lord, Lumen is accustomed to representing others publicly.

• Continued attending school despite assassination threats to avoid signaling Rostov weakness. 22
• Successfully used the signal tower to bypass permission checks and prepare emergency broadcasts to Saint Gallant Castle and Lungmen. 40
• Accepted the City Lord position and began planning reforms concerning Northern Territory residents, Infected people, and noble assets. 45 48

Historical Knowledge

Lumen has been educated in the history and civic symbolism of Kazimierz City.

• Identified Central Park monuments commemorating military campaigns and fallen generals. 29

Equipment

• Siege spear — primary weapon; also used as an improvised explosive-launching platform. 40
• Steam spear launcher — used to fire siege spears and explosive crossbow bolts. 40
• Explosive crossbow bolts — adapted into makeshift explosives during her escape. 40
• Signal-tower access card — supplied by Isaac; bypassed identity verification and granted access to city broadcasts. 40

Relationships

• Orson — Her bodyguard and trusted protector. Their relationship begins when he saves her from assassins; she later relies on his presence during crises and claims him as her citizen for a day after becoming City Lord. 18 20 22 45
• Marquis Rostov — Her father and head of the Rostov family. He is willing to sacrifice himself to secure her future, while Lumen defends Orson when his actions are misunderstood. 27 28
• Talula — Initially rivals over their respective claims on Orson; Talula ultimately entrusts Lumen with the City Lord position and warns her not to be consumed by power. 32 45
• Lumiere — Fellow student and recurring rival, particularly over Orson. Their rivalry gradually becomes more familiar and cooperative. 25 28 30
• Faust — Temporary partner during the escape to the signal tower. Lumen assists with navigation and combat while Faust drives. 39 40
• Ino — A Reunion medical operative who treats Lumen's wound during the signal-tower mission. 40
• W — Former pursuer who notices Lumen's growth after their first encounter. Lumen later faces her without the fear she previously showed. 19 33
• General Hegre — Intervenes to protect Lumen from an Emperor's Guard at the signal tower and identifies himself as the eldest daughter of the Rostov family. 40

Story Role / Major Arcs

Assassination Attempt

Lumen's attempted assassination introduces Orson to the Rostov family conflict with Duke Baikal. Her decision to shield Orson from the assassins establishes her courage and noble sense of responsibility. 18 19

Peterheim Middle School

Lumen continues serving as student council president while Orson attends school under an assumed identity. Her status, her rivalry with Lumiere, and Orson's role as her exclusive bodyguard become central to the school storyline. 22 25

Rostov Security Conspiracy

When Orson exposes a Baikal-aligned mole within the Rostov security forces, Lumen initially struggles with the chaos surrounding her father's actions but ultimately trusts Orson's judgment. 27 28

Kazimierz City Incident

Lumen becomes a key courier during the operation against Duke Baikal. Accompanied by Faust, she reaches the signal tower while evading Baikal's troops, mercenaries, and an Emperor's Guard. 39 40

City Lord of Chernobyl

Following Baikal's defeat, Lumen accepts leadership of Chernobyl. She resolves to use her authority to address the aftermath of the conflict and support the Northern Territory rather than merely preserve noble privilege. 45 48

Notable Quotes

“I am not just Natalia, but also the heir to the Rostov family. My every word and action represents the honor of the family.” 22

“Citizen Orson, I, as the City Lord, command you: you belong to me for the entire day today!” 45