A person’s spirit is their mind, will and emotions. It is who you are.
So a spirit is not and never can be a literal person in itself. If it were, it would cease to be a spirit.
For instance, in order for a spirit to be another person, it would also have to have its own spirit.
In other words, for the Holy Spirit to be a person, it would have to have its own spirit in order to have its own mind, will and emotions. So you would end up with the Spirit of the Holy Spirit.
Along with this false theology introduced by Satan so he could achieve worship, man seems to have lost all touch with the reality of what a spirit is.
However, while our spirit is within us, God's Spirit can do what ours can't. He can send His Spirit anywhere and is how He and His Son represent “Themselves” where “They” are not personally present.
In other words, the Holy Spirit is their presence and power in you.
Unless of course you have chosen Satan’s creation called “god the spirit!” Then you have rejected the Spirit of the Father and Son and have Satan’s creation instead!
This is what Satan planned when he created the Trinity doctrine long after the Bible was written.