Heard that before...prove G-d was talking to "Trinity". Please do it with "logos".
I will speaks as a laymen. Jesus prayed to what. He was baptised with what. Jesus said the father is me and I in the Father. He also, said if you have seen me you have seen the Father. They are they same. Yet in three persons. We see the person of the son in the Gospel. We also see in acts and others that the Holy Spirit can be grieved and He speaks. Attributes of a person. Not to mention that Jesus is the lamb that was slain before the foundation of the world. We don't realise what it cost heaven for us to have salvation.