The Holy Spirit is God.
John 4:24 "God is a Spirit: and they that worship him must worship him in spirit and in truth."
1 John 4:12 "No man hath seen God at any time. "
John 1:18 "No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared him."
There is God.
There is The Father of (J)esus Christ.
There is (J)esus Christ.
They are separate from one another but One. Not in one body but in One Unity.
Moses saw The Face of The Father.
The Apostles saw The Face of (J)esus Christ.
But no man has ever seen The Face of God.