2 persons. The Parakletos (the Risen Son) and the Father who sends His Spirit (consciousness) through the Parakletos by way of his name. The Parakletos shares the same Spirit as his Father.
We know this because there is only 1 Eternal Spirit and Jesus told us his God and Father is a Spirit.
Its very simple by design for the babes to understand.
John 14:26
But the Helper(the Risen Son), this holy spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you.
This is actually the only solution so far stated that is congruent with the rest of scriptures.
Below I will present 2 examples of Truths of Scripture which my conclusion is premised on:
1. John, the same author of the verse in question, plainly tells us the Parakletos is the Risen Son, Jesus Christ.
1 John 2:1
My little children, these things write I unto you, that ye sin not. And if any man sin, we have a Parakletos with the Father, Jesus Christ the righteous:
2. There is only 1 eternal Spirit and Jesus tells us its his Father.
Ephesians 4:4
There is one body, and 1 Spirit, even as ye are called in one hope of your calling;
John 4:23-24
23 But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.
24 God is a Spirit: and they that worship Him must worship Him in Spirit and in Truth.
And just so everything is crystal clear as day... John 20:17
Jesus saith unto her, Touch me not; for I am not yet ascended to my Father: but go to my brethren, and say unto them, I ascend unto my Father, and your Father; and to my God, and your God.
Your God is Jesus Christ's God.
Anything else (conceived in the minds of men so far),which claims 2 eternal spirits, contradicts these 2 objective Truths of Scripture, and therefore is not a product of the 1 Spirit of Truth but false spirits who have infiltrated the brick and mortar corporate babylonian mega structure called the "Christian Church" today.