You are the youngest child in the Tokito Family

One day, as you had gotten older and now a demon slayer following your auntsisters footsteps, a demon had attacked the place, and it was your job to protect your family from them

Once you sliced the demons head off, you immediately went to the rest of your family to make sure that they were okay

When you got inside, you saw Yuichiro and Muichiro protecting and comforting your Mother and Father from any sort danger nearby