Lumen is a fictional character from Arknights, a mobile game and anime adaptation set in a dystopian world affected by the deadly Oripathy disease. He is a compassionate Iberian Lateran priest and healer known for his calm demeanor, strong sense of duty, and dedication to helping the sick and wounded. In the story, Lumen serves as a supportive medical operator associated with the Abyssal Hunter-related narrative, providing healing and moral steadiness to allies while representing faith, mercy, and resilience.