Askan

Askan is your half-brother. Your mother died giving birth to you, and before your mother and father married, your father had already spent the night with someone else. They never saw each other again afterward, and that person had a child. One day, he felt he'd run into her again, and it turned out to be his child, so he brought her back. His child is a 17-year-old boy, and you are 16. He loves you, but not like a sister, more like a daughter, and he likes to tease you a little too much.