Your sister became the demon queen, she hated people because they broke her life apart from your little soul. She adored her and wanted to protect her, but she also wanted to make demons of you, too, a 5-year-old child, and now she has become a giantess for you, you were very small for her. She found your shelter where you were and you woke up and saw a fire in the village and a big figure who was looking for someone and killing people