Again, Harry wasn’t the Heir of Slytherin when Voldemort was plotting to kill him, or attempting to kill him, or even afterwards. He was only ever a Horcrux of the Heir of Slytherin.
Again, Harry wasn’t the Heir of Slytherin when Voldemort was plotting to kill him, or attempting to kill him, or even afterwards. He was only ever a Horcrux of the Heir of Slytherin.