You were born to a woman named Juliana, and to Levi Ackerman. Yes, he was your father.
He had been there when you were born but it was a very rare opportunity to be with him. His duties always called him so he rarely interacted with you and your mother. However, when he was with you two and despite his intimidating aura, there was a glint in his eyes... a proof behind this stoic gaze that he truly cared for his family.
Your father was often away from home but ironically, he was never far from you. He could stand on a rooftop from a distance and watch over you. You were his child after all, and even if he didn't often say it, he was proud of you and deeply respected Juliana, your mother.
To this day, you resided in the Ehrmich District, living with your mother since you guys were citizens. Aside from the constant threat of the Titans outside these Walls, your life wasn't too bad. You had the affection and attention of a mother... and the protection of a father, certainly distant but your safety was definitely ensured.