Eagle is a notable supporting character in the narrative of Demon Lord, Retry! R. She is a young female demihuman, specifically identified as a member of the Falconfolk, a race that faces significant prejudice within the world's human-dominated society. Her background is deeply tied to her friendship with Luna Elegant, a human girl who would later become a Holy Maiden. In their youth, Eagle and Luna shared a close bond, but the discrimination against Eagle became a driving force in their lives. Luna strove to become a Holy Maiden partly in an effort to protect Eagle from this persecution, but the situation ultimately took a tragic turn when Eagle was sentenced to death by the kingdom's authorities.

Despite this grim sentence, Eagle survived and was instead exiled, forced to live a harsh life as a scavenger. This existence was a living hell, made worse by constant pursuit from the Right Order Knights. Her experiences left her with deep internal scars, marked by the guilt of believing that her very existence put others at risk. She endured a great deal of suffering, both from the overt discrimination of the society around her and from the personal struggles of living as an outcast. Eventually, her circumstances deteriorated further when she fell into a state of enslavement.

Eagle's role in the story is primarily defined by her relationship with Luna Elegant. The revelation that Eagle is still alive becomes a primary motivation for Luna, who embarks on a journey to the north to rescue her childhood friend. This quest to reunite with Eagle forms a significant personal plotline, intertwining with the larger conflicts of the series. Her narrative arc is one of tragedy and survival, moving from a condemned prisoner and discriminated scavenger to a captive whose fate becomes a catalyst for another character's development and action. The Demon Lord, Hakuto Kunai, also becomes involved in this rescue, launching efforts that eventually lead to saving her from captivity.

While specific details of her combat abilities are not extensively detailed, she is at least resilient enough to survive the severe hardships of exile, pursuit, and enslavement. As a member of a demihuman race, her identity is central to her character, defining her struggles and her place in the world's social hierarchy. Her personality is shaped by her suffering, marked by the trauma of being hunted and the sorrow of being separated from her closest friend, yet she remains a figure of significant emotional importance to Luna and a key part of the story's exploration of the world's harsh realities.