The Holy Spirit is Not Separable From the Trinity
God is Three Persons in One God. That is, He is Father, Son and Holy Spirit. They do not contradict one another, as they can not. Just as Jesus Christ can not deny the Father or with hold the Holy Spirit, neither can the Father deny the Son or the Holy Spirit. This is basic Church teaching.
This applies also to the Holy Spirit. The Holy Spirit can not go against the Father nor the Son. If the “Holy Spirit” goes against either the Father or the Son of that which they have already revealed, then you are not dealing with the Holy Spirit, but by a false spirit.
This false spirit can only be that of the Devil or one of his many minions.
Calling upon the Holy Spirit in certain situations in which you feel that you need help, and then going about doing whatever it is you do (some of which may be sinful) is not the Will of God. Calling upon the Holy Spirit must be done in prudence. It is reckless and irresponsible and sinful to cite that the Holy Spirit allowed you to commit a sin.
Be wary also of those who try to state that the Holy Spirit can do things that the Father or the Son can not. This is a denial of God in the Father and in the Son. As far as we know, only God the Father knows all as Jesus hints at in Scripture when it comes to the end times.
Just as the Holy Spirit is inseparable from the Father and the Son, the Father is inseparable from the Son and the Holy Spirit, and the Son is inseparable to the Father and the Holy Spirit.
I would suggest we refer the Holy Spirit as the Holy Ghost, as it brings the person-hood of the Paraclete into a clearer understanding.
Seeing as we are in the Octave of Pentecost, it is an appropriate time to highlight a few things in regards to the Holy Spirit.
The Holy Spirit is not a magical gassy figure, that comes down upon us and makes us do interesting things. The Holy Spirit is still God, and helps us and leads us to God the Father and God the Son. It appears that many want us to believe that the Holy Spirit is something that descends upon us and makes us feel all warm and fuzzy inside. If you do not feel the warm and fuzzies, then you are not doing something right and you are without the Holy Spirit.
There are many gifts of the Holy Spirit, in fact there are 7 of them. Those 7 gifts are: Wisdom, Understanding, Counsel, Fortitude, Knowledge, Piety and Fear of the Lord. These are the actual gifts of the Holy Spirit. These are not to be confused with the spiritual gifts of the Holy Spirit.
The Holy Spirit is still God and is not to be interpreted as separate or separable from the Trinity. Separating any person of the Trinity away would constitute as blasphemy.
You hit this one out of the park!
You said that referring to the Holy Spirit as the Holy Ghost better emphasizes the personhood of the third person of the Holy Trinity. I am curious why you say this? Is there some metaphysical reason? Or does it simply break the confused notions of spirits that people have today? And if this latter point is the case, are not people also confused about the nature of ghosts?