Please don't say that a person is not a person in trying to defend the Trinity.   
It just makes you look foolish.   

A cult is any group that denies that Jesus is the One and Only Mighty God, Savior, Lord and King of all creation.   

Who is the Father?   He is the Holy Spirit of Christ Jesus.   The Holy Spirit of Christ Jesus formed His body through Mary so that He could manifest in human flesh.   

Jesus said He and His Father are One (numeric one).   

There is only 1 God and His name is Jesus.