Allina is a fiercely independent woman who has hidden her traumatic past from her family for decades. In the 1930s timeline, she is a principled young woman living in Badensburg whose life shatters when she learns of her hidden Jewish heritage. Forced to assume a forged identity to survive, she moves through the perilous environment of the Lebensborn program while bearing the heavy psychological cost of her forced silence.

Karl is a tall, blond SS Gruppenführer whose demeanor contrasts sharply with the typical officers of the regime. He exhibits an unexpected capacity for restraint and moral consciousness, rebuking his men for crudeness and showing compassion toward the distressed nurses. He becomes a steadying presence for Allina as she struggles to survive within the maternity facility.

Gruppenführer Gud is a senior SS officer who wields absolute power with sadistic cruelty. He embodies the violent corruption of the regime, using his authority to devastate Allina's community before depositing her at the Hochland Home. He operates with total impunity, viewing the women in the Lebensborn program as property of the state and instruments for his own gratification.

Katrine is a woman in her sixties who has spent her life disconnected from her family's European roots. When she unearths a hidden box containing a swastika and wartime photographs beneath her mother's floorboards, she inadvertently shatters decades of protective silence. Her discovery forces her to reevaluate everything she knows about her parents.

Schwester Ziegler is the head nurse at Hochland Home, responsible for enforcing the facility's strict eugenic guidelines. She maintains a cold, clinical detachment, instructing her staff that developing emotional bonds with the infants is forbidden. Her rigid adherence to institutional protocols creates a daunting environment for the young women under her authority.

Rilla is a fifteen-year-old expectant mother residing at Hochland Home. Despite the facility's sterile and emotionally detached environment, she remains fiercely devoted to the idea of motherhood and deeply loves the father of her child. Her immediate kindness provides Allina with a crucial lifeline of friendship during the isolation.

Berta is an ambitious and ideologically committed resident of the Lebensborn program. She embraces the state's view of reproduction as a patriotic duty, proudly declaring her intention to bear five children for the Führer regardless of the fathers' identities. Her emotional detachment from her newborn perfectly aligns with the facility's chilling eugenic goals.

Dieter is Allina's uncle, who raised her in the small German village of Badensburg alongside his wife, Claudia. He runs a local bookshop and maintains a facade of compliance with the rising regime to protect his family. Confronting a terminal illness, he decides he must finally unburden himself of the dangerous secrets he has kept regarding Allina's true heritage.

Aunt Claudia is a pragmatic and protective guardian to Allina. She advocates for strict silence and outward compliance as the only rational means of surviving under Nazi rule. Her profound love for her niece drives her to conceal dangerous truths, believing that preserving Allina's safety outweighs the cost of deception.

Albert is Allina's first love and fiancé, a young man who outwardly appears cautious and compliant with the regime. He frequently travels to Berlin for work, sending vague letters back to Badensburg. Beneath his careful exterior, he harbors a strong moral compass and engages in dangerous, clandestine activities that he hides from Allina to ensure her safety.

Fritz is a childhood friend of Allina and Albert who becomes a fervent member of the Hitler Youth Patrol. He completely absorbs the regime's mandatory race education, parroting hateful rhetoric and threatening those who disagree with him. His embrace of fanaticism demonstrates how the state's ideology fractures long-standing community bonds.

Karin is Allina's best friend from school who marries Fritz. She actively avoids political conflict, preferring to maintain peace by ignoring her husband's increasingly hateful rhetoric and the disappearance of their Jewish neighbors.

Himmler is a high-ranking SS leader and the architect of the Lebensborn network of maternity homes. He views the facilities as essential to breeding racially pure children for the state, emphasizing eugenic protocols over maternal affection. His policies dictate the chilling operational standards that govern the nurses and residents.

Adele is Karl's elderly aunt residing in Switzerland. She projects the persona of a harmlessly eccentric hoarder overflowing with valuable antiques. In reality, she uses this carefully constructed facade and her wealth to quietly support complex, clandestine efforts to assist those fleeing the Reich.

George is Katrine's husband in the 2006 timeline. He provides a calming presence for his wife when she worries about her elderly mother's declining health.