Nerle, often referred to as Ner, is a supporting character in the anime Clevatess. She is a young woman who was born into slavery under a bandit group known as the Crows. Her mother shielded her from the worst of the abuse until she disappeared when Nerle was around twelve years old, after which she suffered constant physical and emotional mistreatment at the hands of her captors. The beatings she endured caused permanent damage, including the loss of hearing in one ear, lasting injuries to her face and teeth, and a slurred or halting manner of speaking. Despite these horrors, her body continued to produce milk after three stillbirths, and the bandits exploited her as a wet nurse for the infants they kidnapped.

Nerle is defined by a quiet, enduring resilience. Her personality is gentle, nurturing, and selfless, shaped by a life of suffering that never extinguished her capacity for kindness. She is timid and submissive at first, conditioned by years of servitude, but she possesses a deep well of maternal tenderness and a strong protective instinct. Her primary motivation is to care for others, especially the baby Luna, and to find a sense of purpose and belonging after being treated as little more than property for most of her life.

Her role in the story becomes crucial after she is mortally wounded while shielding Luna during an attack. Clevatess resurrects her using his dark magic, and her body is partially merged with troll tissue, granting her surprising physical robustness and strength. A visible mark of this rebirth is that the front portion of her hair takes on the color of troll fur. Following this resurrection, she formally assumes the role of Luna's wet nurse and primary caregiver. While Clevatess and Alicia handle external threats and their own complicated natures, Nerle provides the day-to-day maternal comfort, stability, and warmth that the infant needs. She becomes the emotional anchor of the group, offering a human heart and a sense of normal routine amidst the chaos of their journey.

Nerle's key relationships are central to her development. With Luna, she forms a profound maternal bond, treating the baby as her own child and finding purpose in protecting and nurturing her. Her relationship with Clevatess is built on a mix of awe and gratitude; he freed her from slavery and granted her a second life, and she addresses him with deference, often calling him Master. Despite his fearsome nature, she learns to trust him. With Alicia, she shares a quieter but supportive dynamic, functioning as a bridge that helps soften the tension between the reluctant undead hero and the demon king, and offering Alicia a model of gentleness and care. Through this unconventional family, Nerle undergoes significant development. She transforms from a broken, traumatized slave into a confident and capable caretaker who finds agency and value in her role. Her rebirth is both literal and emotional, allowing her to leave her past of abuse behind and embrace a future defined by love and protection.

In terms of notable abilities, Nerle does not possess combat skills or magical power. Her strength lies in her physical endurance and newfound resilience, courtesy of the troll tissue integrated into her body, which makes her sturdier than an ordinary human. Her primary ability is her capacity as a wet nurse and caregiver, a role that proves essential for Luna's survival and well-being. She also possesses a quiet emotional intelligence, able to read the needs of those around her and soothe tensions within the group. Her greatest ability is her unwavering compassion, which humanizes the story's darker elements and provides the emotional core of the series.