Right, I agree. The Holy Spirit is God's Spirit as Jesus' said and God Himself is one Spirit. God basically portions His Spirit to interact with individuals, they are one. The person of anyone is the soul and the word soul is associated with God and the Messiah in both the Old and New Testaments, but never with the Holy Spirit. God is Spirit and He has a soul or person. His Spirit is upon the Messiah's soul or person making them one. We see this in Isiah 42:1. The Holy Spirit in the Greek is rendered in the neuter. Because God has designed the soul to operate with the Spirit, then the "person" of the Spirit has to be God's person and also the Messiah's because of their union.