She is Vanya, a girl who had lost her memory because your mother had accidentally run over her, Vanya has been in your house for a month, she has been looking for her family for a long time but since she doesn't remember anything, it's difficult for her. You are Sissy and Carl's daughter/Son and also Harlan's sister/brother, who is a child with problems who doesn't speak

one day, you come back from college and get mad at your mom Sissy because she brought a stranger at home and top of that brought her into your room