TV-Series
Description
Nonna, also known as Sarah, held the position of the highest-ranking human authority within the Grace Field House system before Isabella's tenure. She commanded the Mamas overseeing all five Grace Field plantations and supervised candidates training to become Mamas or Sisters. Her role provided privileged knowledge, including the identity of every child's biological mother and their specific plantation destination.

Her path to becoming Nonna followed the initial stages required for becoming a Mama. Candidates first attained the rank of Mama before selection as Nonna, based on superior competence and experience upon the previous Nonna's death or incapacitation. Upon assuming the position, the tracking chip in her heart was deactivated, and her identification number tattoo was erased.

Years earlier, Sarah served as a Mama at one of the Grace Field plantations. During this period, she oversaw a young Isabella and Leslie. When Isabella discovered the orphanage's horrific truth and attempted to escape alone by climbing the wall, Sarah intercepted her using the radar system, signaling her descent and ending the attempt. Later, Sarah personally escorted Isabella to the gates on her shipment day, where Isabella met the then-current Nonna. Sarah eventually rose to replace that predecessor. As Nonna, she gained authority to command subordinate caretakers and the farm demons operating within the Grace Field plantations.

Sarah maintained a relationship with Isabella marked by deep faith in her capabilities, viewing her as a favored protégé above others like Krone. When Sister Krone attempted to warn Sarah about the older children's escape plans at Plantation 3, Sarah dismissed the concerns. She expressed confidence in Isabella's ability to manage the situation alone, referencing Isabella's own thwarted escape years prior. Sarah explicitly told Krone she was merely a replaceable pawn and an obstacle to Isabella. Immediately after this conversation, Sarah ordered a demon under her command to assassinate Krone.

Following the successful mass escape of fifteen children, including premium products Emma and Ray, from Grace Field House Plantation 3 on January 15, 2046, Sarah confronted Isabella at the gates. She harshly reprimanded Isabella, addressing her by her plantation number and condemning the loss of valuable livestock. However, the demon leadership ultimately held Sarah responsible for failing to manage Isabella. As punishment for the security breach, Sarah was executed and served as a meal during the Tifari ceremony on January 27, 2046. Isabella was subsequently appointed as the new Nonna, replacing Sarah.

Physically, Sarah was an elderly woman with short, curly grey hair, a large rounded nose, prominent wrinkles, and full lips. Her eyes were typically obscured. She wore the standard black high-collared dress uniform of the Grandmother position. In her youth as a Mama, she had short, curly light blond hair and wore the standard Mama attire: a black dress over a white blouse with a white apron. Her anime adaptation appearance featured shorter hair.