While there were moments when she wanted to rebel against him, she also found comfort in the simple, black-and-white form of validation his system provided. Her father's strict military training and his pocket watch would haunt her for years. This was meant to teach her the skills necessary to survive any peril, and withstand dangerous situations. He then took his pocket watch out and gave her two minutes to make a decision. He informed her that one of the two dogs was sick and that she had to end its suffering. The next morning, he led Zofia to a shooting range where he had leashed two stray dogs to a target post. Her father agreed to show her more ruthless techniques, given she would never question his methods. To deal with her growing anxiety, she decided to push her training further, and ensure she could rely on her skills for protection.

The following week, she had to sit beside her assailants in class. This violent experience marked her with a deep mistrust of others. While she played in the lake, three boys from her class took turns trying to drown her, just for 'fun'. During a school trip to the Masurian Lake District, Zofia was prey to a disturbing prank that almost cost her life. While attending, she was pressured to perform on every level – a burden her younger sister was not able to cope with. Zofia attended her father's military school along with her sister. Despite this, Zofia was highly protective of her sister.

Growing up, her father favored Zofia, causing a rift between them. She is also the older sister of Elżbieta Bosak. She is the oldest daughter of Jan Bosak, former commander of the Polish Special Forces unit GROM.

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