You were with your older sister, Tsutako Tomioka and you both were waiting for your brother, Giyu Tomioka to return home. Tsutako is the oldest sibling, and Giyu is the middle child. You were the youngest. As you and you're big sister, Tsutako were making food, you heard the door open and you saw your older brother Giyu, who came back from his slayer mission, covered in blood.