Allyson Nelson is the granddaughter of Laurie Strode and the daughter of Karen Nelson, and a main character in the Halloween (franchise). She first appears in Halloween (2018) and is played by Andi Matichak.
Allyson Gertrude Nelson was born in Haddonfield, Illinois in 2001 to parents Karen and Raymond Nelson. She has also met her grandmother, Laurie Strode on occasion, but never visited her house. As a child, Laurie would tell her stories about Michael Myers and it scared her.
This is a movie about a family and for this person, Michael Myers kills her dad. And then goes after her mom and grandmother(Laurie Strode) they then burn him, but he actually doesn’t kill him, and leads to another movie.